Furnace Ignitor Replacement Cost in 2026: Price Guide

A furnace ignitor replacement typically costs $100 to $250 in 2026, including the replacement part and professional labor. The national planning range is approximately $90 to $400 per repair, with an average of about $175. The final furnace ignitor replacement price depends on the ignitor type, the furnace model, technician labor rates, diagnostic charges, and whether additional repairs are necessary. Most straightforward residential repairs fall within the typical range, while specialized parts, difficult access, and after-hours service can increase the total.

A furnace ignitor is responsible for starting combustion in many gas furnaces. When it fails, the furnace may run its blower without producing heat, attempt to start repeatedly, or shut down before completing its heating cycle. Replacing a failed ignitor is generally a relatively small repair compared with replacing a furnace, but an accurate diagnosis is important because other components can produce similar symptoms.

The following guide explains national 2026 planning prices, including hot-surface ignitors, labor, diagnostic fees, additional repairs, and the circumstances in which replacing the ignitor makes financial sense.

Furnace ignitor replacement cost at a glance

Cost item	Estimated price
National low-end replacement cost	$90
Typical replacement cost	$100–$250
National average replacement cost	About $175
High-end replacement cost	$400
Universal hot-surface ignitor part	$15–$35
OEM replacement ignitor part	$20–$100
Typical technician labor component	$80–$200

These figures are national planning estimates for a residential repair, not a guaranteed contractor quote. The $90 to $400 range covers the overall repair, while the $100 to $250 range represents a more common budget for replacing one ignitor.

The component price is only part of the bill. A technician may need to inspect the furnace, confirm that the ignitor has failed, remove the old component, install the replacement, and verify that the furnace starts and operates correctly. Some companies include diagnosis in the quoted repair price, while others charge separately.

A simple replacement with an accessible, readily available part may land near the lower end of the typical range. A repair involving a specialized component, extensive troubleshooting, or a premium service appointment can approach or exceed the upper end.

What does the average price include?

A typical replacement estimate includes one compatible ignitor and the labor required to replace it. It may also include basic startup testing and confirmation that the furnace completes its ignition sequence.

The estimate does not necessarily include a separate diagnostic fee, emergency dispatch charge, replacement of a flame sensor, control-board repairs, gas-valve repairs, or corrections to a larger furnace problem. Ask the contractor whether the quoted amount represents the complete installed price.

What moves the price

Several factors determine the final gas furnace ignitor replacement cost. The biggest differences usually come from the replacement part, the technician's minimum service charge, the amount of diagnostic work required, and the furnace's design.

1. Ignitor type

Most modern residential gas furnaces use an electronic ignition system. A common design is a hot-surface ignitor, which heats up until it can ignite the gas. Other systems use a spark ignition assembly or a different ignition arrangement.

Hot-surface ignitors are common replacement parts, but they are not interchangeable simply because they look similar. The component must match the furnace's electrical specifications, mounting arrangement, connector, and manufacturer requirements.

A universal hot-surface ignitor can cost less than a manufacturer-specific part. However, a universal part is appropriate only when it is explicitly compatible with the furnace and installed according to its instructions. An incompatible component can cause unreliable ignition or damage.

2. Replacement part availability

Some furnaces use common ignitors that local HVAC suppliers keep in stock. Others require a particular assembly that must be ordered.

A readily available part can help keep the repair simple. A special-order part may increase the total through additional labor, shipping, or a return visit. Availability can also be more limited for older or discontinued furnace models.

Before approving a replacement, ask the technician to identify the part number and confirm whether the quoted price includes obtaining the correct component.

3. Furnace accessibility

An ignitor is generally located near the burner assembly, behind a furnace access panel. Its accessibility varies with the unit's layout.

A furnace installed in an open utility room may be easier to service than one located in a cramped attic, tight crawlspace, or crowded mechanical closet. Difficult access can increase the time needed to inspect the appliance, remove the failed part, and complete testing.

The repair itself may be identical, but labor costs can differ substantially when a technician must work around obstructions or safely access a difficult installation.

4. Diagnostic requirements

A furnace that will not ignite does not automatically have a failed ignitor. The technician may need to check the thermostat signal, safety switches, wiring, control board, flame sensor, gas supply, and ignition sequence.

If the ignitor is visibly damaged or fails the manufacturer's specified electrical checks, diagnosis may be relatively straightforward. If the furnace repeatedly attempts ignition without starting, additional testing may be necessary.

More diagnostic time can increase the bill, especially when the company charges a separate service-call fee. However, accurate diagnosis helps prevent paying for a new ignitor when another component is responsible for the failure.

5. Labor rates and appointment timing

HVAC companies set different labor rates according to operating expenses, technician experience, local competition, and demand.

A standard weekday appointment is usually less expensive than an emergency call during a cold night, weekend, or holiday. Some companies charge a premium for same-day service or appointments outside regular business hours.

Ask whether the estimate includes travel, diagnosis, installation, and testing. A low advertised service-call price may cover only the visit, with the repair charged separately.

6. Furnace age and condition

A newer furnace with an available replacement part may be inexpensive to repair. An older unit may require more troubleshooting if wiring, burner components, or other ignition-system parts have deteriorated.

Age alone does not make ignitor replacement uneconomical. The more important questions are whether the furnace is otherwise safe, whether the part is available, and whether other major repairs are likely.

If the furnace has a history of repeated breakdowns, consider the cost of the current repair alongside the likely cost of future service.

Cost by ignitor type and material

The following table separates estimated component prices from installed repair costs. These are planning ranges rather than exact prices for every furnace model.

Ignitor type or part category	Estimated part cost	Estimated installed cost
Universal hot-surface ignitor	$15–$35	$100–$225
OEM hot-surface ignitor	$20–$100	$110–$300
Ceramic hot-surface ignitor	$20–$100	$110–$300
Silicon carbide ignitor	$15–$60	$100–$250
Silicon nitride ignitor	$20–$100	$110–$300
Spark ignition electrode or assembly	$20–$100	$110–$300
Specialized ignition assembly	$50–$150 or more	$150–$400

These categories can overlap. Silicon carbide and silicon nitride describe materials used in certain hot-surface ignitors, and their prices depend on the specific design. The figures above are broad budgeting allowances, not a claim that every material or model has a fixed price.

A spark ignition system may use a different assembly and service procedure from a hot-surface system. The listed installed ranges are indicative estimates; the overall national planning range remains $90 to $400 for a typical ignitor replacement repair.

Universal versus OEM ignitors

A universal replacement is designed to fit a defined range of compatible applications. Its lower purchase price can make it attractive when the furnace manufacturer permits its use.

An OEM, or original equipment manufacturer, part is made for a particular equipment specification or supplied through the manufacturer's parts system. It may cost more, especially when the model requires a specific connector or assembly.

Neither category is automatically the better choice for every furnace. Compatibility, manufacturer requirements, reliability, warranty terms, and installation quality matter more than the label alone.

Ask the technician to explain why the proposed part is appropriate. If an OEM part is substantially more expensive than a compatible alternative, request the difference in price and the reason for the recommendation.

Why hot-surface ignitors require careful handling

Hot-surface ignitors often contain a fragile heating element. Some designs can crack or become damaged when handled improperly, and contamination can affect performance.

A technician should handle the replacement according to the component's instructions, use the correct mounting hardware, and avoid forcing the element into position. The new part should also be installed with the specified electrical connection and clearances.

Cost by furnace size

Furnace capacity is usually measured in British thermal units per hour (BTU/h). A larger furnace does not necessarily need a more expensive ignitor because the component is selected primarily by the ignition system and model specifications.

Furnace input capacity	Estimated installed ignitor replacement
Up to 40,000 BTU/h	$100–$225
40,001–60,000 BTU/h	$100–$250
60,001–80,000 BTU/h	$100–$275
80,001–100,000 BTU/h	$110–$300
More than 100,000 BTU/h	$125–$350

These are broad planning allowances, not a verified national price schedule by furnace capacity. They overlap because a smaller furnace can use an expensive proprietary part, while a larger unit may use an inexpensive, widely available ignitor.

The capacity of the furnace should not be used as the sole basis for choosing a replacement. The furnace model number and the manufacturer's parts information are more useful for identifying the correct component.

Commercial equipment and large specialty heating systems may fall outside these residential estimates.

Labor vs. materials

Labor often accounts for a substantial share of the total furnace ignitor replacement price. The part itself may cost only a few dozen dollars, but the technician must also travel to the property, diagnose the failure, install the component, and test the system.

Expense	Typical planning amount
Replacement ignitor	$15–$100
Technician labor	$80–$200
Diagnostic or service-call fee, if separate	$75–$150
Basic installation and startup testing	Often included in labor
Total installed replacement	$100–$250 typical; $90–$400 overall

The table shows common budgeting allowances, not charges that should automatically be added together. A contractor may bundle diagnosis and labor into a single repair price, while another may list each item separately.

For example, a $30 ignitor does not mean the entire repair should cost $30. A technician may have a minimum labor charge even when the physical replacement takes relatively little time.

Conversely, a separate diagnostic fee should not be added to an estimate without checking whether the contractor credits that fee toward the repair. Some companies apply the initial service charge to approved work, while others charge it in addition to the installation price.

Example repair budgets

Consider three illustrative estimates for a typical residential gas furnace.

Example	Parts	Labor and other charges	Total
Simple weekday replacement	$25	$100	$125
Replacement with additional diagnostic time	$50	$150	$200
Specialized part and difficult service conditions	$100	$250	$350

These examples illustrate how costs can add up. They are not contractor quotes or statistically measured price averages. Actual charges depend on local rates, the specific furnace, and the work required.

When comparing estimates, look at the total amount due rather than comparing the parts price alone.

Cost per unit or square foot

Furnace ignitor replacement is priced per repair, not by square foot of living space or linear foot of equipment. The ignitor is a specific component within the furnace, so the size of the home is not a reliable direct pricing formula.

Pricing basis	Appropriate planning method
Per ignitor	$100–$250 typical installed cost
Per furnace	Budget for each furnace that needs its own repair
Per square foot of home	Not a meaningful standalone pricing method
Per linear foot of ductwork	Not applicable to ignitor replacement
Per heating zone	Relevant only if separate equipment or systems require work

A 1,200-square-foot home and a 2,500-square-foot home can have similar ignitor replacement costs if both use comparable furnaces and require the same repair.

Home size can affect costs indirectly. Larger homes may have multiple furnaces or separate heating systems, each with its own ignition components. If two furnaces need replacement ignitors, the homeowner should budget for two repairs rather than applying a simple square-foot multiplier.

Ductwork condition and the home's insulation level may affect heating performance and energy consumption, but they do not directly determine the price of replacing one ignitor.

Hidden and extra costs

The initial quote may not cover every expense associated with a furnace that fails to ignite. Some additional charges are legitimate when extra work is necessary, but homeowners should understand what each charge covers before authorizing repairs.

Diagnostic or service-call fees

A technician may charge for traveling to the property and determining why the furnace is not working. This fee can be separate from the ignitor replacement price.

Ask whether diagnosis is included in the quoted total or billed separately. Also ask whether the fee will be credited toward the repair if the work is approved.

Emergency service charges

A furnace failure during freezing weather may require an urgent appointment. After-hours dispatch, weekend work, or holiday service can raise the total.

If indoor temperatures remain safe and the situation is not urgent, a standard appointment may be less expensive. However, a home without heat during dangerously cold weather requires prompt attention, particularly when children, older adults, or other vulnerable occupants are present.

Flame sensor replacement

A dirty or faulty flame sensor can cause a furnace to shut down after ignition. A homeowner may mistake this symptom for an ignitor failure because both problems can prevent normal heating.

The furnace flame sensor replacement cost is a separate expense from replacing the ignitor. If both components require service, the contractor should explain the evidence supporting each repair and provide an itemized estimate.

Cleaning a serviceable sensor may be sufficient in some cases. Replacement should be based on the manufacturer's diagnostic procedure and the component's condition rather than an assumption that every ignition problem requires multiple new parts.

Control-board or gas-valve repairs

A faulty control board, gas valve, pressure switch, or other safety component can prevent ignition even when the ignitor is functional.

These repairs can increase the bill considerably because the replacement part and diagnostic work may cost more than an ignitor alone. The technician should identify the failure and explain why the proposed repair is needed.

A new ignitor will not solve an underlying gas-supply or control problem.

Wiring and connector repairs

Damaged wires, loose connections, or heat-damaged connectors can interfere with ignition. A technician may need to repair or replace affected wiring before the furnace can operate safely.

The added expense depends on the damage and whether the problem is limited to a connection or involves a larger section of the electrical system.

Replacement-part shipping or special ordering

A discontinued or specialized ignitor may need to be ordered. Shipping, supplier availability, and the need for a second visit can affect the total.

Ask whether the part is in stock and whether the estimate includes shipping and any return-trip labor.

Furnace replacement or major repairs

An ignitor failure alone rarely justifies replacing an entire furnace. However, if diagnosis reveals a major safety issue or several expensive component failures, a broader assessment may be appropriate.

Compare the current repair estimate with the likely cost of additional repairs and the condition of the heating system. A separate furnace-replacement estimate can help clarify whether continued repairs are financially reasonable.

Signs you need the work

A failing ignitor can produce several recognizable symptoms, although none proves the ignitor is defective without testing.

The furnace runs but does not produce heat

The thermostat may call for heat and the furnace may start its normal sequence, yet the burners never ignite. The blower may eventually run without delivering warm air, depending on the furnace's control sequence.

A failed ignitor is one possible explanation. Other causes include a gas-supply problem, a safety switch, a faulty control board, or a problem with the thermostat signal.

The ignitor does not glow

Many hot-surface ignition systems use an ignitor that visibly glows before the gas valve opens. If the component no longer heats during a normal ignition sequence, it may have failed.

However, a lack of visible glow does not establish that the ignitor itself is defective. The control system may not be supplying power because another safety condition has not been met.

Do not remove furnace panels or reach into the burner compartment while the appliance is operating to inspect the component.

The furnace repeatedly attempts to start

Repeated startup attempts can indicate that the ignition sequence is not completing. The control board may pause between attempts and eventually lock out the system.

The cause could be a weak or failed ignitor, but it could also involve gas delivery, flame detection, airflow-related safety controls, or another component.

If the furnace repeatedly fails to start, stop resetting it and arrange for diagnosis rather than repeatedly cycling the power.

The furnace starts intermittently

A furnace that works on some heating cycles but fails on others may have an intermittent electrical connection, an aging ignitor, a control problem, or another ignition-related fault.

Intermittent operation deserves attention because the symptom can be difficult to reproduce during a short service visit. Tell the technician when the problem occurs and whether any diagnostic lights or fault codes appear.

The furnace shuts down shortly after ignition

If the burners light and then shut off, the problem may involve flame sensing rather than the ignitor. A flame sensor that cannot reliably confirm combustion can cause the control system to close the gas valve.

Other safety or combustion problems can produce similar behavior. The technician should determine whether the ignitor, flame sensor, or another component is responsible before replacing parts.

The ignitor has visible damage

A cracked, broken, or visibly deteriorated hot-surface ignitor may need replacement. These components can be fragile and may fail after repeated heating cycles.

Do not touch or handle the ignitor while the furnace is hot or energized. Let a qualified technician inspect it if its condition is uncertain.

There is a gas smell

A gas smell is not a normal sign of an ignitor simply wearing out. If gas is smelled, leave the building and contact the gas utility or emergency services from a safe location. Do not operate electrical switches, use flames, or attempt to troubleshoot the furnace inside the building.

A gas odor requires immediate safety action rather than a routine ignitor replacement appointment.

How long does replacement take?

A straightforward furnace ignitor replacement may take roughly 30 to 90 minutes of hands-on service, including basic inspection and testing. The full appointment may take longer because the technician must travel, diagnose the failure, and document the work.

A common replacement part that is already available can usually be installed more quickly than a specialized assembly that requires ordering or additional troubleshooting.

The repair may take longer if the ignitor is difficult to access, the mounting hardware is damaged, or another component prevents the furnace from starting after the new part is installed.

The time required should not be the only factor used to evaluate the quote. Even a relatively quick repair can involve travel, diagnostic equipment, specialized training, and responsibility for confirming safe operation.

How to save money

There are several practical ways to control furnace ignitor replacement expenses without compromising safety or reliability.

Schedule service before an emergency

If the furnace shows intermittent ignition problems during mild weather, arranging a standard appointment may help avoid an after-hours charge when temperatures drop.

Do not delay a repair if the furnace cannot maintain a safe indoor temperature. In cold conditions, protect occupants and arrange prompt service.

Confirm the diagnosis

Ask the technician to explain how the ignitor was tested and what evidence indicates failure. A clear diagnosis reduces the risk of paying for a component that will not resolve the problem.

If the furnace still fails after the ignitor is replaced, ask what the next diagnostic step will cost before approving additional work.

Request an itemized estimate

An itemized estimate should identify the part, labor, diagnostic charges, and any additional repairs. This makes it easier to compare companies and spot charges that are not included in the advertised replacement price.

Ask for the complete installed price, including applicable fees and testing. A low part price is not useful if the total repair bill is substantially higher than expected.

Compare more than one contractor

When time and weather conditions allow, obtain two or three quotes for the same repair. Give each contractor the furnace make and model, describe the symptoms, and ask for a compatible part and complete installed price.

A substantially lower estimate is not automatically better. Confirm that the contractor will diagnose the fault, install an appropriate part, test the furnace, and explain the warranty.

Ask about service-call credits

Some HVAC companies apply the diagnostic fee toward an approved repair. Others charge for diagnosis separately.

Ask about this policy before booking if the company does not clearly explain it. A credit can make the final repair more affordable, especially when the initial diagnosis is straightforward.

Avoid unnecessary parts replacement

Replacing the ignitor, flame sensor, control board, and gas valve together without evidence of multiple failures can waste money.

A technician should test the relevant components and explain the findings. Cleaning or correcting a connection may resolve some problems without replacing a functional part, while a genuinely failed component should be repaired or replaced as appropriate.

Check warranties

A furnace may have a parts warranty that covers certain replacement components, although coverage varies by manufacturer, registration status, equipment age, and warranty terms.

Labor may not be covered even when the part is covered. Ask the contractor to check applicable warranty information and explain any remaining charges before ordering the component.

Maintain the furnace

Regular maintenance can help identify ignition problems, dirty sensors, loose connections, restricted airflow, and other issues before they cause a heating failure.

Maintenance does not guarantee that an ignitor will never fail. However, identifying related problems early can help prevent avoidable service calls and make it easier to distinguish routine wear from a larger equipment problem.

Regional and climate considerations

The national furnace ignitor replacement cost range provides a useful starting point, but local prices can vary.

Cold-weather regions

In areas with long, cold winters, HVAC companies may receive a large number of emergency calls when furnaces fail. Higher demand can limit appointment availability and increase the cost of urgent service.

Homeowners in colder climates may benefit from addressing intermittent ignition issues before the heating season reaches its busiest period.

Warmer regions

In warmer parts of the country, furnaces may operate for fewer hours each year. A furnace that receives limited use can still develop ignition problems, and an older ignitor can fail when heating demand returns.

Scheduling maintenance before the first sustained cold spell can help identify problems before the system is needed regularly.

High-cost metropolitan areas

Labor rates and operating expenses can be higher in major metropolitan markets. Travel time, local wages, and business overhead may contribute to a repair price above the national typical range.

Smaller markets may have lower standard labor rates, but limited access to specialized parts can offset some of the savings.

Rural locations

Rural homeowners may face longer technician travel distances and fewer available HVAC providers. A service company may charge a trip fee or require additional time to obtain a specific replacement part.

Ask whether the quote includes travel and whether the part is available locally.

Extreme weather and emergency demand

When temperatures fall sharply, many homeowners seek furnace service at the same time. An otherwise routine repair may cost more if emergency scheduling is required.

If a furnace fails during dangerous cold, prioritize safe heating arrangements and prompt professional service rather than waiting solely to obtain a lower price.

How to hire a contractor

Choosing a qualified HVAC technician matters because an ignition problem can involve gas delivery, electrical components, and furnace safety controls.

Verify licensing and insurance

Licensing requirements vary by state and locality. Check the applicable rules and confirm that the contractor holds any required credentials for the work being performed.

Ask whether the company carries appropriate insurance and whether the technician has experience servicing the furnace's make and model.

Request a written estimate

The estimate should identify the suspected failure, the replacement component, labor, diagnostic fees, and any additional charges. It should also explain whether the quoted price includes testing and whether tax or other fees may apply.

If the technician recommends replacing multiple components, request the diagnostic reason for each item.

Confirm the part and warranty

Ask whether the replacement is an OEM component or a compatible alternative. Confirm that the part matches the furnace specifications and that its use is permitted by the manufacturer.

Ask about both the part warranty and the labor warranty. These may have different coverage periods and exclusions.

Ask about safe-operation testing

After replacement, the technician should follow the manufacturer's procedure to verify that the furnace completes its ignition sequence and operates correctly.

The scope of testing depends on the equipment and the repair. Ask what checks are included and whether any additional fault remains unresolved.

Questions to ask before approving the repair

• What test confirms that the ignitor has failed?
• Is the quoted amount the complete installed price?
• Is the diagnostic fee included or credited toward the repair?
• Which replacement part will be installed?
• Is the part compatible with the furnace's exact model?
• Does the price include startup testing and verification of normal operation?
• What warranty covers the part and the labor?
• Are any other components showing signs of failure?
• If the furnace still does not ignite, what additional diagnostic charges could apply?
• Is standard scheduling available, or does the appointment require an emergency-service fee?

A clear answer to these questions makes it easier to compare quotes and understand what the repair includes.

DIY or hire

Replacing a furnace ignitor may appear simple because the part is often small and inexpensive. However, a gas furnace combines electrical controls, combustible gas, hot surfaces, and safety interlocks. A mistake can cause equipment damage or unsafe operation.

What DIY replacement costs

A replacement hot-surface ignitor may cost $15 to $35 for a universal component or approximately $20 to $100 for an OEM part. The actual price depends on the furnace model and the required component.

A homeowner who already has the correct part and appropriate skills may avoid professional labor charges. However, the apparent savings should be weighed against the risk of ordering the wrong part, damaging a fragile element, misconnecting wiring, or failing to identify the underlying fault.

A part purchase is not a complete repair budget if additional tools, diagnostic equipment, or professional troubleshooting are needed.

Why diagnosis matters

A furnace that will not ignite may have a faulty ignitor, but the problem may also involve the thermostat, gas supply, flame sensor, control board, wiring, or a safety switch.

Replacing the ignitor without confirming the diagnosis can leave the original problem unresolved. Repeated attempts to start the furnace may also cause the system to enter a lockout state.

A qualified technician can test the ignition sequence and determine whether the ignitor is receiving the required electrical supply and operating as specified.

Safety considerations

Follow the furnace manufacturer's service instructions and all applicable safety requirements. Do not bypass safety switches, alter gas connections, or work on energized components.

If a gas odor is present, leave the building and contact the gas utility or emergency services from a safe location. Do not continue troubleshooting.

For most homeowners without relevant HVAC experience, professional diagnosis and replacement are the more practical option. The additional labor cost buys installation, testing, and a better chance of identifying the actual failure.

Repair or replace

A failed furnace ignitor is usually a reason to repair the furnace, not replace the entire heating system. The component is relatively inexpensive compared with the cost of installing a new furnace, and a straightforward replacement can restore normal heating when the rest of the system is in good condition.

However, the best decision depends on the furnace's age, repair history, efficiency, safety, and the cost of any other work required.

When ignitor replacement makes sense

Replacement is generally reasonable when the furnace is operating safely, the ignition system has a confirmed failed component, and other major parts remain in good condition.

A repair in the typical $100 to $250 range is usually a manageable expense compared with the cost of a new furnace. Even a replacement near the upper end of the $90 to $400 national range may make sense if the equipment has many useful years remaining.

The technician should still investigate why the ignitor failed and check for related problems when the symptoms suggest more than one issue.

When a broader repair is appropriate

If the furnace has repeated ignition failures, electrical problems, or several aging components, ask for a broader diagnostic assessment. Multiple repairs may be necessary, but each recommendation should be supported by testing.

A control-board or gas-valve failure may cost more than an ignitor replacement. Compare the complete cost of restoring reliable operation with the furnace's overall condition before approving extensive work.

If the furnace has a serious safety defect, such as a compromised heat exchanger, the decision must prioritize safe operation rather than the price of the ignitor alone.

When furnace replacement deserves consideration

A new furnace may be worth evaluating when the existing system is old, inefficient, unreliable, or facing several expensive repairs. The decision should not be based on age alone; equipment condition and expected future expenses matter.

A replacement estimate should include the equipment, installation labor, required venting or electrical changes, any necessary ductwork modifications, and applicable permits. The cost may be substantially higher than an ignitor repair, so compare the full project scope.

Related guides on furnace repair and furnace replacement can help homeowners evaluate the difference between repairing an individual component and replacing an entire heating system. An assessment of ductwork may also be useful when heating problems involve airflow or distribution rather than ignition alone.

A practical decision rule

Use the following approach when deciding what to do:

• If the ignitor is confirmed faulty and the furnace is otherwise in good condition, repair it.
• If the furnace has additional faults, request an itemized estimate for the full set of necessary repairs.
• If major safety concerns or repeated expensive failures are present, compare the repair estimate with the cost of a replacement system.
• If the diagnosis is unclear, ask for an explanation before authorizing more parts.

The goal is not simply to choose the cheapest immediate option. It is to restore safe, dependable heating at a reasonable total cost.

Final budgeting advice

For a residential gas furnace, plan on $100 to $250 for a typical ignitor replacement in 2026. Use $175 as a practical national-average budgeting figure and allow for a wider $90 to $400 range when the part, labor, diagnostic work, or appointment conditions are uncertain.

A replacement component may cost only $15 to $100, but the installed price also reflects diagnosis, technician time, and operational testing. The exact furnace model is the best starting point for identifying the correct part and obtaining a reliable estimate.

Before approving work, confirm the diagnosis, request an itemized installed price, ask about warranties, and make sure the technician will verify normal furnace operation after the repair. If the furnace continues to fail, investigate the underlying cause rather than assuming that another ignitor is needed.