Bathroom fan turns itself back on


  #1  
Old 09-28-19, 02:56 AM
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Bathroom fan turns itself back on

Just bought a new house (2009) and the master bathroom ceiling fan can be turned off but then turns itself back on again within 30 seconds. The. I have to turn it on and off again and watch it turn itself back on again in 30seconds. Its runs 24 hours a day
 

Last edited by Chadfreitag; 09-28-19 at 02:58 AM. Reason: Clarificatin
  #2  
Old 09-28-19, 03:24 AM
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Just bought the house? How long ago. Has this been happening since you moved in? Is it always 30 seconds and it goes on again?

Most bathroom ceiling exhaust fans will go on with the light if there is no window in the bathroom to help vent moisture out of the bathroom during bathing (steam).

Are you sure there is not a timer somewhere in the bathroom? What kind of switch are you using to turn it on and then off again. What is presently installed to control the fan? Is there some type of moisture control switch that turns the fan on automatically if there is too much moisture in the bathroom (if so this may be malfunctioning)?

How large is the bathroom? Are there two doorways to enter the bathroom (meaning you may have a switch 3way at each doorway) so when you enter the bathroom you can turn the light on from either doorway?

A bit more information and we may be able to lend you some ideas.
 
  #3  
Old 09-28-19, 03:49 AM
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As said, many exhaust fans have a humidity sensor that will turn on the fan even if the switch is off.
Do you happen to have a digital timer switch?
What is the make and model of the fan and what kind of switch controls it?
 
 

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