If the fan only works on high, the blower motor resistor has failed. If it doesn't work at all or squeals, it's the motor itself. Both live behind the glovebox on most cars and both are quick mobile repairs.
Signs you need blower motor & resistor
- Fan only works on the highest setting
- No airflow at any setting
- Squealing or clicking from the dash when the fan runs
- Airflow cuts in and out
What we do on site
- Test power and ground at the motor and resistor
- Remove the glovebox or lower dash panel
- Replace the blower motor or resistor, clean out leaves and debris
- Verify all fan speeds
Doing this in a driveway
Interior job, so weather doesn't matter. We do these anywhere.
Parts we use
Blower motor, blower motor resistor or control module, cabin filter.
Pricing: Resistors are cheap; motors are low-to-moderate. Every job is quoted in writing before we start, and there's no upsell — how our pricing works.
FAQ
Blower Motor & Resistor: common questions
Why did the resistor fail?
Usually because a dying motor drew too much current through it, or debris got past a missing cabin filter. We check the motor draw when we replace a resistor.