ManualHarbor

Furnace Blower Motor Replacement Cost

Updated October 9, 2026

Replacing a furnace blower motor costs about $575 on average for a standard PSC motor and about $875 for a more efficient ECM motor, according to This Old House, which bases its figures on Angi estimates. Fixr's furnace repair guide lists $562 to $1,045 for a blower motor, including the service call and the part. Motor type, horsepower and access to the motor are the main reasons quotes differ.

Blower motor replacement cost at a glance

  • This Old House (updated Aug. 10, 2026; Angi-based) — What the figure covers: Average replacement cost by motor type; PSC motor: About $575; ECM / variable-speed motor: About $875; Overall: Labor $150–$250
  • Fixr furnace repair guide (updated Aug. 29, 2025) — What the figure covers: Service call plus replacement part; PSC motor: Not split; ECM / variable-speed motor: Not split; Overall: $562–$1,045
  • PickHVAC (June 3, 2025) — What the figure covers: Motor price only, before labor; PSC motor: $100–$315 (single-speed); ECM / variable-speed motor: $500–$1,000+; Overall: Most homeowners pay $350–$700 for professional replacement
  • Bob Vila (updated Nov. 28, 2022; Angi, HomeAdvisor, HomeGuide data) — What the figure covers: Replacement cost; PSC motor: $400–$500; ECM / variable-speed motor: $600–$800; Overall: $250–$900, average $515

The Bob Vila figures are older; they are included because they split motor types, and they point the same direction as the newer sources: ECM jobs cost a few hundred dollars more than PSC jobs.

PSC vs. ECM: why the price gap

PSC (permanent split capacitor) motors are the traditional design. A 2014 Department of Energy Building America report notes that most existing residential furnaces use them, and that most PSC motors change speed in a way that barely changes their power draw. They depend on a run capacitor, a small part This Old House lists at about $30.

ECM (electronically commutated) motors, also called brushless permanent-magnet (BPM) motors, use built-in electronics to vary speed. The same DOE report says furnace makers have offered them in some high-end furnaces since 1985 and that most new two-stage furnaces use them. The motor costs more, and its electronic control module is also sold as a separate part: This Old House lists an ECM module alone at about $520.

You may also see two BPM families on quotes. In its furnace-fan rulemaking, DOE describes constant-torque BPM motors (often called "X13") and constant-airflow BPM motors (often called "ECM"), noting those labels are one manufacturer's product names. DOE's efficiency standards for residential furnace fans took effect for manufacturers on July 3, 2019, and the level DOE adopted was analyzed around constant-torque BPM motors with multi-staging rather than baseline PSC motors. Ask your technician which type your furnace has, since it determines the replacement part and price.

Cost by speed and horsepower

This Old House's averages show how much the motor's design and size matter:

  • Single-speed — Average cost: $600
  • Two-stage or multi-speed — Average cost: $710
  • Variable-speed — Average cost: $1,050
  • 1/4 hp — Average cost: $325
  • 1/3 hp — Average cost: $450
  • 1/2 hp — Average cost: $560
  • 3/4 hp — Average cost: $838
  • 1 hp — Average cost: $1,125

Source: This Old House (updated Aug. 10, 2026), based on Angi estimates.

Labor and access

This Old House estimates $150 to $250 in labor for one to three hours of work. PickHVAC puts the technician's time at 45 to 90 minutes and says technicians typically charge a $75 to $150 minimum that covers the first hour, with rates often doubled outside business hours. Fixr reports hourly rates of $87 to $162 depending on location.

Mounting style matters too. In the DOE field study, swapping a motor held by a belly band took about two hours on average, while motors held by brackets took twice as long.

What the warranty covers

Most furnace warranties pay for the motor but not the labor to install it, This Old House notes. Two manufacturer examples:

  • Trane: Furnace parts are covered for five years under the base warranty or 10 years if registered within 60 days of installation; the heat exchanger is covered for 20 years either way. Labor is excluded from both.
  • Carrier: Furnaces are eligible for Carrier's Consumer Choice program: register within 90 days and choose 10 years of parts coverage, or five years of parts plus three years of labor if your installing dealer participates.

Have your serial number ready when you call, and ask whether the quote assumes a warranty part. This Old House also cautions that DIY repairs could void the warranty.

Signs the blower motor is failing

This Old House and Bob Vila list similar symptoms:

  • Weak or no airflow from the vents while the furnace runs
  • Squealing, screeching, rattling or banging from the furnace cabinet
  • A burning smell or signs of overheating
  • The furnace shutting down repeatedly
  • Higher energy bills with no other explanation

On a PSC motor, a failed capacitor can produce a motor that hums but won't turn, InspectApedia notes, so a technician should test the capacitor before condemning the motor.

How much electricity an ECM motor saves

DOE's Building America measure guideline for high-efficiency gas furnaces (2012) says ECM-type motors are about twice as efficient at moving air as standard PSC motors. Field results vary with the home:

  • A 2003 Energy Center of Wisconsin study of new furnaces, cited by DOE, found electricity savings with BPM motors of 50% in heating, 31% in cooling and 80% in continuous fan operation.
  • A 2014 DOE retrofit study replaced PSC motors with drop-in BPM motors in eight homes near Syracuse, New York. Fan power fell by about 126 watts in heating and 220 watts in cooling, for average savings of 163 kWh a year. The four homes that also ran the fan on its own saved another 176 to 470 kWh a year.
  • Because a more efficient motor gives off less heat, the furnace burned slightly more gas: about 3.3 therms a year on average in that study.
  • The retrofit cost about $475 installed in that study (2014 pricing), and the authors found heating-and-cooling savings alone usually did not justify it; homes that used fan-only mode did better.

The study's authors concluded a retrofit pays off best when the furnace has at least 10 years of life left, equipment is right-sized, the ducts are not restrictive, and the fan often runs outside heating and cooling. Your thermostat's fan setting decides how often the blower runs on its own, so check it if you are weighing an ECM; ManualHarbor lists ENERGY STAR certified smart thermostats.

Worked example: is the ECM premium worth it?

Example (illustrative): The PSC motor in your furnace has failed and the technician offers a compatible ECM instead.

  • Price difference: $875 − $575 = $300, using This Old House's averages.
  • Electricity saved: 163 kWh/year, the DOE study's heating-and-cooling average.
  • Electricity price: 18.19¢/kWh, the U.S. residential average for January–July 2026 (EIA).
  • Annual savings: 163 kWh × $0.1819/kWh = about $29.65.
  • Simple payback: $300 ÷ $29.65 per year = about 10.1 years.

If your household runs the fan on its own often, add the study's fan-only savings of 176–470 kWh (176 × $0.1819 ≈ $32; 470 × $0.1819 ≈ $85 a year). Payback then becomes $300 ÷ ((163 + 176) kWh × $0.1819) ≈ 4.9 years at the low end and $300 ÷ ((163 + 470) kWh × $0.1819) ≈ 2.6 years at the high end. This ignores the small extra gas use. Replace 18.19¢ with the rate on your own utility bill; local prices vary widely by state.

When the furnace's age changes the math

  • Over 15 years old: ENERGY STAR suggests calling a contractor to evaluate a furnace older than 15 years, and says an ENERGY STAR certified furnace is 15% more efficient than a conventional one.
  • Lifespan: Fixr gives modern high-efficiency furnaces a life expectancy of 15 to 20 years; blower motors themselves last 10 to 20 years, according to This Old House.
  • Under 10 years old: Fixr says a furnace that young shouldn't need major repairs and may still be under warranty, which favors fixing it.
  • Cost threshold: Bob Vila's 2022 guide suggests replacing the furnace when a repair exceeds 30% of the cost of a new one. This Old House lists furnace installation at $1,600 to $9,700.

If you are pricing replacements, ENERGY STAR certified furnaces and gas furnaces list efficiency ratings by model. Homes that also need new cooling may compare ducted split-system heat pumps.

Who should do the work

A gas furnace combines line-voltage wiring, a gas valve and combustion venting in one cabinet. Blower motor replacement should be done by a licensed HVAC technician, both for safety and because DIY work can void the warranty; Trane, for example, says DIY or handyman work will void its coverage.

FAQ

Can a PSC blower motor be replaced with an ECM?

Sometimes. Drop-in BPM replacement motors exist, but the DOE study found compatibility limits, including motor size (1/2 hp or smaller), thermostat type and motor mounting. A technician can confirm whether your furnace qualifies.

Does a warranty cover the whole blower motor replacement?

Usually only the part. Trane excludes labor from its furnace warranties, and Carrier covers labor only under an optional dealer-participation choice.

How long does a furnace blower motor last?

About 10 to 20 years, according to This Old House and Bob Vila.

Is it worth replacing the blower motor in a 15-year-old furnace?

It can be if the rest of the furnace is in good condition, but 15 years is when ENERGY STAR recommends a professional evaluation. Get a replacement quote at the same time so you can compare.

Related guides

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