Bathroom Fan Keeps Running

The brown wire connected to l the black connect to n and the grey connect to ls.

Ceiling fans with remote. The moisture from a bathroom environment will slowly wash away the original bearing lubrication. Energy star and many new building codes require the use of some type of automatic mechanical ventilation system to provide fresh air exchanges in new homes. A centrally located exhaust fan.

If your humidity controlled fan has a pull cord it is also possible that somebody has pulled the cord to the override position in which case the fan will run continuously until switched back to the sensor mode. Bathroom fan motors that grind or squeal as they run may have dry bearings. This will operate continuously at a low speed then have a high speed for when the bathroom is in use.

A dual speed exhaust fan in the bathroom. If you think your air quality is fine and you want to make the fan switchable again you should be able to easily swap the outlet back out for a switch. If mold is detected in a house a common recommendation is to increase air exchange by installing a continuously running fan.

A drop or two of bearing. Vent axia bathroom extractor fan constantly running. Sometimes there is a damper that will open and the furnace fan kicks on to draw in fresh air or you can use an exhaust fan on a timer to draw in fresh air along with the damper.

I had a vent axia silhouette lo carbon extractor fan model 441626 100ht humidistat and timer installed. Another thing to look for is a humidistat wired with the fan. I would turn the breaker off pull the controller switch and disconnect its power if the fan stops you know where the problem is the switch.

Look on the exterior of your furnace for a 24 hr timer. The fan is constantly running even when the light switch is off. Some but not all fans with a pull cord will have a neon light to indicate when the fan has been pulled to override.

If your fan is running all the time at a high rate it may be possible to install a motion sensing module.