i just moved into a home built 2018 and i have noticed my exhaust fan in laundry room turns on by itself all the time i turn it off with the switch near the light switch but it turns on again even when we are not doing laundry i’m not sure why? also for some reason there cold air and dirt blowing in from outside instead of it blowing out air the air and dirt is coming in what can i do to stop this? i also noticed this is happening with my stove vent cold air and dirt blowing in the house instead of the air going out. any suggestions?
As for the laundry room fan, here’s a good video that will help you understand the operation of the fan. (2) Why is my bathroom exhaust fan always on even when the switch is off. - YouTube
I recommend checking the exhust termination point or the vent hood. Birds can access some of the cheaper ones and cause damage not only to the vent cover but also to the vent hose.
These are decent covers that are pest proof and are available for 4 or 6 inch diameter hoses.
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