Range Hood / Vent Fan Not Working or Weak
A range hood that barely moves air or has gone silent is usually choked with grease or has a tired motor. Most of the fix is cleaning; the rest is a straightforward part.
1. Clean the Grease Filter
The metal mesh filter clogs with grease and chokes airflow — this is the number-one cause of weak suction. Pop it out and run it through the dishwasher or soak it in hot soapy water with a little degreaser. Clean it monthly if you cook often.
2. Clean the Fan Blade and Housing
Grease builds up on the blower wheel and housing, unbalancing the fan and reducing airflow (and making noise). With power off, wipe the blade and inside of the hood with a degreaser.
3. Dead Fan: Motor or Switch
If the fan won't run at all but the light works, the fan motor or the speed switch has likely failed. If neither the fan nor light works, check the outlet/wiring and the breaker. A replacement blower motor is a common part.
4. Recirculating vs Vented
If your hood recirculates (no duct outside), it relies on a charcoal filter that loses effectiveness — replace it every few months. A recirculating hood will never move air as well as a vented one even when working.
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FAQ
Almost always a grease-clogged filter and blower wheel. Clean the metal filter and wipe the fan blade; replace the charcoal filter on recirculating hoods.
The fan motor or the speed switch has likely failed. If both fan and light are dead, check the wiring and breaker.
Always unplug an appliance and shut off its water supply before servicing. This guide is informational and not a substitute for a qualified technician.