GarageLogic
MEMBER EMERITUS
Puzzled why the furnace fan will run with the thermostat set lower than the house temp. We don't have an air-to-air exchanger and this seems like new behavior.
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Furnace (fan) running intermittently
- Thread starter GarageLogic
- Start date
ripperd
Well-known member
Does your tstat have a intermittent fan setting (sometimes called CIRC)? I use that setting during the spring/summer/fall to help the temp stay even throughout the house. It runs the fan 20 mins of every hour.
is the fan switch on the t-stat set to manual or auto?
fitter30
Well-known member
Could be the fan control in gas furnace
https://inspectapedia.com/heat/Fan_Limit_Switch_Guide.php
https://inspectapedia.com/heat/Fan_Limit_Switch_Guide.php
OP
GarageLogic
MEMBER EMERITUS
Well, I feel stupid - there is a CIRC setting that I never noticed before. Not sure how it got set to it, but that is what the mystery was. Thanks for the responses.
SGKent
Banned
so you are observant - many folks wouldn't have a clue the fan was running. Good Job to you and all who commented.