Symptoms
- Fan makes no sound and no air moves on any speed
- Climate control display and buttons still light up normally
- No air even in defrost mode
- Sometimes preceded by a weak or intermittent fan
Likely causes
- CommonBlown blower motor fuseCheapest and easiest thing to check first; a tripped fuse cuts the motor off completely.
- CommonFailed blower motorMotors wear out over years of use, especially in dusty climates, and simply stop spinning.
- PossibleBad blower motor relayThe relay that supplies power to the motor can fail even if the motor itself is fine.
- PossibleBlockage jamming the fan wheelLeaves, debris, or a small object can physically jam the blower fan so it can't spin.
- Less commonWiring or connector failureA broken wire or corroded connector between the switch and motor interrupts power.
What to do
- Check the owner's manual fuse diagram for the blower motor fuse and inspect/replace it if blown.
- Listen closely with the fan on for any faint motor sound or clicking, which suggests a jam rather than total electrical failure.
- Locate the blower motor relay (often in the engine bay fuse box) and swap it with an identical relay from another circuit to test.
- Access the blower motor (often under the dash on the passenger side or under the hood) and check for visible debris jamming the fan wheel.
- If the motor spins freely by hand but doesn't run electrically, test for power at its connector with a multimeter.
- Replace the blower motor if it's confirmed dead and getting proper power.
Tools and parts
- Multimeter
- Screwdriver
HVAC blower motor for your vehicleSearch: “blower motor assembly”
When to call a pro
See a mechanic if fuses and relays check out fine but there's still no airflow; they can trace the wiring and confirm whether the motor itself needs replacing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.