318984-753 – INDUCER MOTOR (CARRIER, AFTERMARKET, DIRECT, SM4753)

The draft inducer motor pulls combustion gases out of your furnace and vents them safely outside. If your Carrier furnace won’t ignite, shows a pressure switch error, or the inducer motor is noisy or won’t start, this aftermarket motor covers a wide range of Carrier units.

Specs: 115V, 1/25 HP, 3300 RPM. Aftermarket SM4753.

Replaces: 318984-753, 1183527, 1186530, HC21ZE114, HC21ZE117, HC21ZE123, HC21ZE123A, HC21ZS123, 65569

Fits: Carrier: 373LAV060115AJJA, 58PAV090-18116; Bryant and Payne furnaces using inducer motor 318984-753.

Need help? See our Furnace Not Heating Guide.

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

• TypeDraft inducer motor assembly
• OEM CompatibilityCarrier

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 318984-753
• SM4753

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Fits these models

• Carrier / Bryant 80%+ and 90%+ AFUE gas furnaces using this draft inducer assembly (verify exact part number against your unit)
• Common Carrier model families: 58MVB, 58MVP, 58MEC, 58CVA, 58STA, 58TUA — verify cross-reference to your specific model

My furnace lights then shuts off after a few seconds -- is the inducer bad?

Almost never. That symptom is virtually always a dirty flame sensor -- the burner lights, but the sensor isn't pulling enough microamps to confirm flame, so the board closes the gas valve as a safety. Pull the flame sensor, clean it with fine emery cloth, reinstall. That fixes 9 out of 10 "ignites then dies" calls.

My furnace won't even try to ignite -- could it be the inducer?

Possibly. The ignition sequence is: thermostat calls heat -> inducer motor comes on -> inducer pulls negative pressure -> pressure switch closes -> ignition starts. If the pressure switch never closes, the board throws a "pressure switch open" fault code and the cycle never starts. Normal causes: (1) a bad pressure switch, (2) a bad inducer motor, (3) a clogged flue vent, or (4) a clogged hose between the switch and the inducer. Check the hose and vent first (free), then bench-test the switch and the inducer.

How do I test an inducer motor?

Pull the assembly, spin the wheel by hand -- should turn freely, no grinding. Apply 120V directly to the motor leads (skip the board) -- should run smoothly. If it doesn't spin, draws weak airflow, or bearings whine, replace.

Will an aftermarket inducer fit my OEM equipment?

Aftermarket inducer assemblies are engineered to be direct replacements for one specific OEM part -- they're not "universal" parts you spec-match like motors or fan blades. The aftermarket either replaces your exact OEM assembly (look for "DIRECT REPLACEMENT" in the title) or it doesn't fit at all. Bring the old assembly or your unit's model + serial number; we'll cross-reference at the counter.

How long should an inducer motor last?

8-15 years typical. Bearing failure is the usual mode. Sealed-bearing motors last longer than open-bearing.