Quick answer
A furnace inducer motor costs $400–$900 to replace in Ontario, installed. The spread comes from the part: a complete factory assembly with housing, wheel and gasket costs more than a universal motor, and prices differ between Carrier, Lennox, Goodman and KeepRite. Before paying for one, have the vent, the condensate drain and the pressure switch checked, because all three produce the same fault code.
Replacing a furnace inducer motor costs $400–$900 installed, which puts it in the upper-middle of furnace repairs. The inducer is the small fan that starts before anything else when the thermostat calls for heat. The furnace will not light until that fan proves it is moving air, so a dead inducer means no heat at all, and a wrongly diagnosed one means paying for a part you did not need.
Where an inducer motor sits among furnace repair prices
- Diagnostic visit: $90–$150, credited toward the repair when you go ahead.
- Flame sensor cleaning or replacement: $150–$300.
- Capacitor or pressure switch: $250–$500.
- Draft inducer motor: $400–$900.
- Control board: $500–$1,200.
- Blower motor: $500–$1,500, depending on the motor type.
Most furnace repairs land between $150 and $800, so an inducer is a mid-to-upper repair and not, on its own, a reason to replace a furnace. The full list is on our pricing page. The other motor in the cabinet, which people often confuse with this one, is covered in what a furnace blower motor costs.
What the inducer does and how it fails
The inducer motor, also called the draft inducer or combustion blower, pulls combustion gases through the heat exchanger and pushes them out the vent. It runs for a short purge before ignition and for the whole burner cycle. A pressure switch connected to it by a rubber hose confirms the draft; if the switch does not close, the control board will not open the gas valve.
- Seized or worn bearings. The motor hums, squeals or grinds at start-up, runs slow, or does not turn at all. This is the usual failure on an older furnace.
- A cracked housing. On condensing furnaces the inducer housing is plastic and sits in the path of acidic condensate. A crack or a failed gasket leaves rust-coloured drips or a white crust on the parts below, and the leak can let flue gas into the cabinet.
- A broken or loose wheel. The motor spins but moves little air, with a rattle or a rhythmic thump.
- Failed windings, or a failed run capacitor on models that use one. The motor is silent and may be hot to the touch.
Fault codes that point to the inducer, and what else trips them
A failed inducer shows up on the control board as a pressure switch fault: the board asked for draft and the switch never closed. On many Carrier furnaces that is code 31, and on many Goodman boards it is three flashes for a pressure switch stuck open. Codes vary by model, so the chart on the inside of the furnace door is the one to trust.
The same code appears when the inducer is healthy and something else is blocking the draft. These are checked first, because every one of them is cheaper than a motor:
- Blocked vent or intake: snow, ice, leaves or a nest at the outside termination. You can look at this yourself from the ground and clear loose snow by hand.
- Blocked condensate drain or trap. Water backs up into the collector box and the fan cannot pull draft through it. Clearing a drain or replacing a trap typically runs $150–$350.
- A cracked, loose or water-filled pressure switch hose, or a plugged port where the hose meets the housing.
- A failed pressure switch: $250–$500. Why a furnace pressure switch keeps failing explains how a technician tells the switch from the fan with a manometer.
If you can hear the inducer start and run smoothly and the furnace still faults, the motor is probably not the problem. If the furnace is silent after the thermostat clicks, or the fan hums without turning, it probably is.
OEM assembly or universal motor: why the brand changes the price
The part is where the $400–$900 spread comes from. An OEM inducer is sold as a complete assembly (motor, wheel, housing and gasket) built for that furnace model, and it drops in with the draft characteristics the pressure switch expects. A universal replacement is a motor, sometimes with adapter brackets, meant to fit many furnaces. It costs less, but it reuses your old housing and wheel.
A universal motor is a fair choice on an older single-stage furnace with a sound housing. It is the wrong choice when the housing is cracked, when a two-stage or modulating furnace uses a variable-speed inducer, or when a parts warranty calls for factory parts. Assemblies for Carrier, Lennox, Goodman and KeepRite are priced differently by their distributors, and a discontinued model can mean a wait. On a registered furnace still inside its parts warranty, the assembly may be covered, leaving labour only.
Is it safe to run a furnace with a failing inducer?
A noisy inducer that still runs is safe to use while you wait for the repair, though it can quit without warning, so book it before a cold snap. The design is fail-safe: if the fan stops, the pressure switch stays open and the burners never light. The exception is a cracked housing or water dripping from the inducer. Turn the furnace off at its switch and call, because that leak carries flue gas and corrosive condensate.
Once the diagnosis is right, the part decides the bill, not the hour it takes to fit. ZK Mechanical tests the vent, drain, hose and switch before quoting an inducer, and gives you the price in writing before the part is ordered. Book furnace repair or request a visit through the contact page; the 24/7 line is (647) 801-1252.