How Much Does Furnace Repair Cost in 2026?

The average furnace repair costs $150–$600. See a full breakdown by repair type, furnace type, and region — plus use our free calculator for an instant estimate.

Furnace Repair Cost Summary

Item	Low	High	Note
National Average	$300	$500
Typical Range	$150	$600
Minor Repairs (flame sensor, thermocouple, capacitor)	$75	$400
Moderate Repairs (ignitor, gas valve, control board)	$150	$1,200
Major Repairs (blower motor, heat exchanger)	$300	$3,500
Diagnostic / Service Call Fee	$75	$200
Emergency / After-Hours Surcharge	$150	$600	per hour labor

Based on national averages from Angi, HomeAdvisor, Fixr, and HomeGuide (2025–2026 data). Actual costs vary by location, furnace type, and contractor.

What Drives the Cost of a Furnace Repair?

The final price you pay for a furnace repair depends on five main factors. Understanding these can help you anticipate costs and avoid overpaying.

1. The Type of Repair

This is the biggest variable. A quick flame sensor cleaning costs $75–$200, while a heat exchanger replacement runs $500–$3,500. Here's how common repairs break down by severity:

Minor repairs ($75–$400): Flame sensor, thermocouple, capacitor, limit switch. These involve inexpensive parts and under an hour of labor.

Moderate repairs ($150–$1,200): Ignitor, gas valve, control board, pressure switch, inducer motor. Parts cost more, and diagnosis may take longer.

Major repairs ($300–$3,500): Blower motor, heat exchanger, evaporator coil. These involve expensive components and several hours of labor. For furnaces over 15 years old, major repairs often make replacement the smarter financial choice.

2. Your Location

Labor rates and cost of living vary dramatically across the US. The same repair that costs $300 in Mississippi might cost $450 in California.

Region	Cost Multiplier	Example: $400 Repair
South / Midwest	0.85–1.0x	$340–$400
National Average	1.0x	$400
Northeast	1.05–1.20x	$420–$480
West Coast	1.15–1.35x	$460–$540
Hawaii / Alaska	1.30–1.40x	$520–$560

3. Furnace Type

Electric furnaces are the cheapest to repair ($50–$400). Gas furnaces fall in the middle ($100–$1,200). Oil furnaces are the most expensive ($400–$2,500) due to specialized parts and soot-related maintenance.

4. Timing

Emergency and after-hours repairs cost 50–200% more than standard-rate service. Weekend and holiday calls are the most expensive. If it's not a safety issue, scheduling a next-business-day appointment can save you hundreds.

5. Furnace Age

Older furnaces cost more to repair for two reasons: parts are harder to source (and more expensive when found), and one repair often leads to another as other aging components fail. This is why the $5,000 rule exists — at a certain point, continued repairs on an old furnace are throwing money away.

Complete Furnace Repair Cost by Component

Item	Low	High	Note
Flame Sensor (clean/replace)	$75	$300	Minor
Limit Switch	$65	$125	Minor
Thermocouple	$100	$300	Minor
Capacitor	$100	$400	Minor
Ignitor / Hot Surface Igniter	$150	$400	Moderate
Pressure Switch	$150	$350	Moderate
Relay Switch	$150	$300	Moderate
Transformer	$100	$450	Moderate
Burners	$150	$500	Moderate
Control Board / Circuit Board	$200	$1,200	Moderate–Major
Gas Valve	$200	$1,500	Moderate–Major
Draft Inducer Motor	$200	$1,500	Major
Blower Motor	$300	$2,500	Major
Evaporator Coil	$600	$2,000	Major
Heat Exchanger	$500	$3,500	Major

Prices include parts and labor at standard rates. Emergency and after-hours rates add 50–200%.

The $5,000 Rule: Should You Repair or Replace?

The $5,000 rule is the most widely-used guideline for deciding whether to repair or replace a furnace. The formula is simple:

Furnace Age (years) x Repair Cost ($) = Rule Score

If the score exceeds $5,000, replacement is generally the better investment.

Examples:

Furnace Age	Repair Cost	Score	Recommendation
8 years	$300	$2,400	Repair
12 years	$350	$4,200	Repair
15 years	$400	$6,000	Replace
10 years	$600	$6,000	Replace
20 years	$200	$4,000	Repair (but consider age)

The rule works because older furnaces have less remaining useful life. Spending $400 on a 5-year-old furnace buys you another 10–15 years of service. Spending $400 on a 18-year-old furnace might buy you one more season before something else fails.

Use our Repair vs. Replace Calculator to run the numbers for your specific situation. It factors in your furnace's age, repair cost, efficiency rating, and location.

Other Signs It's Time to Replace

Beyond the $5,000 rule, consider replacing your furnace if:

It's over 15 years old and needs a major repair (heat exchanger, blower motor, control board)
Your heating bills have increased by 20%+ over the past few years — this indicates declining efficiency
You've needed 2 or more repairs in the past 2 heating seasons — frequent breakdowns signal systemic aging
It has a cracked heat exchanger — this is a carbon monoxide safety hazard and usually makes replacement mandatory
Replacement parts are hard to find — some manufacturers discontinue parts for older models

Furnace Repair Cost by Region

Where you live has a significant impact on what you'll pay. Here's how average furnace repair costs compare across major metro areas:

City	Avg. Repair Cost	Diagnostic Fee	Notes
Denver, CO	$350–$650	$100–$175	High demand (cold winters) drives prices up
Salt Lake City, UT	$300–$600	$90–$160	Strong seasonal demand Oct–Mar
Las Vegas, NV	$250–$550	$85–$150	Lower demand keeps prices moderate
Seattle, WA	$325–$625	$100–$175	Higher labor rates, moderate demand
Chicago, IL	$300–$600	$90–$165	Very cold winters, competitive market
Houston, TX	$225–$500	$75–$140	Lower cost of living, less furnace use
Phoenix, AZ	$200–$475	$75–$135	Low demand for furnace repair
New York, NY	$375–$700	$125–$200	Highest labor rates in the country
Philadelphia, PA	$300–$575	$90–$160	Moderate cost, cold winters
Portland, OR	$300–$600	$90–$165	Similar to Seattle market

Use our Furnace Repair Cost Calculator to get an estimate adjusted for your state and repair type.

How to Save Money on Furnace Repair

Get multiple quotes. For non-emergency repairs, get 2–3 quotes. Pricing varies significantly — a blower motor replacement might be quoted at $800 by one company and $1,400 by another.

Ask about the diagnostic fee. Many contractors charge $75–$200 to diagnose the issue but credit that amount toward the repair if you hire them. Always ask upfront.

Schedule in the off-season. HVAC contractors are least busy April through August. You'll typically save 15–25% compared to peak season (November through February).

Check your warranty. Parts warranties last 5–10 years. Heat exchangers on premium furnaces often have lifetime warranties. Don't pay for a part that's still covered.

Maintain your furnace annually. A $90–$200 tune-up prevents the majority of breakdowns. According to ASHRAE, 85% of furnace repairs are caused by lack of maintenance. This is the single best investment you can make.

Change your filter. A $5–$30 filter change every 1–3 months prevents the most common cause of furnace problems. A clogged filter forces your furnace to work harder, leading to overheating, short cycling, and premature component failure.

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Furnace Repair Cost FAQ

How much does the average furnace repair cost?

The average furnace repair costs $300 to $500, including parts and labor. Minor repairs range from $75 to $400, while major repairs like a heat exchanger replacement can cost $500 to $3,500. The diagnostic fee ($75–$200) is usually additional unless credited toward the repair.

What is the $5,000 rule for furnace repair?

The $5,000 rule says to multiply your furnace's age (in years) by the estimated repair cost. If the result exceeds $5,000, replacement is the better financial decision. For example, a 15-year-old furnace needing a $400 repair scores $6,000, pointing toward replacement.

How much does a furnace diagnostic cost?

A furnace diagnostic or service call fee typically costs $75 to $200. Many companies will credit this toward the cost of the repair if you hire them. Emergency and after-hours diagnostics cost $150 to $300.

Is it worth repairing a 20-year-old furnace?

Generally no, unless the repair is very minor (under $200). A 20-year-old furnace has exceeded its expected lifespan of 15–20 years, replacement parts are harder to source, and a new furnace will be 20–40% more energy efficient, saving hundreds per year on heating bills.

Why is furnace repair so expensive?

Furnace repair costs reflect specialized labor ($75–$150/hour), expensive replacement parts (a control board alone costs $100–$600), and the complexity of diagnosing HVAC systems. Emergency surcharges (50–200% markup) and regional cost-of-living differences also drive prices up.

How much does emergency furnace repair cost?

Emergency and after-hours furnace repairs cost 1.5x to 3x the standard rate. Expect to pay $150–$600 per hour for labor plus parts. A repair that costs $300 during business hours could run $500–$900 on a weekend night or holiday.

What is the most expensive furnace repair?

Replacing a heat exchanger is the most expensive common repair at $500 to $3,500. A blower motor replacement ($300–$2,500) and evaporator coil replacement ($600–$2,000) are also among the costliest repairs.

Does homeowners insurance cover furnace repair?

Standard homeowners insurance does not cover furnace repairs from normal wear and tear. It may cover damage from a covered event like a fire or lightning strike. A home warranty plan ($35–$65/month) covers mechanical breakdowns with typical limits of $2,000–$6,500 per system.

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