Symptoms
- Fan doesn't turn on at any speed setting
- Fan runs but airflow feels weak
- Light works but fan doesn't
- Unusual noise from the fan before it stopped working
Likely causes
- CommonClogged grease filter restricting airflow so much it seems like the fan failedA heavily clogged filter can make a working fan seem weak or ineffective.
- CommonBurned-out fan motorRange hood fan motors wear out over years of regular use, especially with heavy grease exposure.
- PossibleTripped breaker specific to the hood's circuitSome hoods share a circuit with the oven, while others have their own dedicated breaker.
- PossibleFaulty fan switchThe switch controlling fan speed can fail independently of the motor.
- Less commonLoose or damaged wiring connection to the fan motorA connection issue can prevent power from reaching an otherwise good motor.
What to do
- Remove and clean the grease filter(s), which can be run through the dishwasher or hand-washed with degreaser.
- Check your breaker panel for a tripped breaker related to the hood if it's on a separate circuit.
- Test each fan speed setting to see if any speed works, which can help narrow down a switch versus motor issue.
- Turn off power to the hood and visually inspect accessible wiring connections for looseness.
- Listen for any humming from the motor when the fan is switched on, which suggests the motor is trying to run but may be seized.
- Replace the filter if cleaning doesn't restore airflow and the fan itself is confirmed to be spinning.
- Have a technician replace the fan motor or switch if the motor doesn't run at all or only hums.
Tools and parts
- Screwdriver
Range hood fan motorSearch: “range hood exhaust fan motor replacement”
When to call a pro
If the fan doesn't run at any speed after cleaning the filter and checking the breaker, have a technician replace the motor or switch.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.