Bathroom Exhaust Fan Not Pulling Air — San Francisco, California
Your bathroom exhaust fan runs but doesn't clear steam or odors — a tissue held against the grille barely moves or falls away. Common causes include a clogged or crushed duct run, a stuck backdraft damper, a motor spinning too slowly due to worn bearings, or a duct that was never actually connected to an exterior vent (more common than you'd expect in older homes). An electrician experienced with ventilation can inspect the fan motor, verify cfm output with an anemometer, check the duct for kinks or blockages, and ensure the run terminates correctly through the roof or soffit — not into the attic, which causes moisture damage and mold.
Waarom dit veel voorkomt in San Francisco
Many SF Victorians retain knob-and-tube or early aluminum wiring that violates current code and poses fire risk. California's aggressive electrification drive — heat pumps, EV chargers, solar — frequently forces full panel upgrades, and CSLB licensing plus DBI inspection apply to nearly all work.
Who to call
For this problem in San Francisco, call a: Elektricien
Vind een Elektricien in San FranciscoSymptoms to look for
- Fan runs audibly but a tissue test shows almost no suction at the grille
- Bathroom mirror stays fogged for 10+ minutes after a shower despite the fan running
- Musty or moldy smell in the bathroom even when the fan is on
- Visible condensation forming on ceiling or walls during showers
Spoeddienst in San Francisco
Emergency home services in San Francisco are available 24/7 at premium rates — expect $150–$300+/hour for after-hours plumbing or electrical, the highest tier in the US. Response times average 45–90 minutes given hilly terrain and parking scarcity. Always verify an active CSLB license and proper DBI permits.