Dometic thermostat issue - furnace and AC Fan running at same time?

[5 hole]

Just popped up this AM.

Set the Furnace to on to take chill off in AM.
Automatically the overhead fan comes on ( air only, no cooling) as well as the Furnace .
Furnace runs till it reaches temp and shuts off, overhead fan keeps running.

Only way to stop fan is to shut off at stat control.

This is the first weekend we have really used our overhead fan/ AC unit. Until now Furnace ran normal cycles.

Anyone have an idea why this is happening?

[TexasBob]

Originally Posted by 5 hole

Just popped up this AM.

Set the Furnace to on to take chill off in AM.
Automatically the overhead fan comes on ( air only, no cooling) as well as the Furnace .
Furnace runs till it reaches temp and shuts off, overhead fan keeps running.

Only way to stop fan is to shut off at stat control.

This is the first weekend we have really used our overhead fan/ AC unit. Until now Furnace ran normal cycles.

Anyone have an idea why this is happening?

Make sure you fan is on auto, not high or low.

[5 hole]

thanks texas Bob, that was it!

[TexasBob]

Don't ask me how I knew that

[Ford Idaho]

Originally Posted by TexasBob

Don't ask me how I knew that

Knew what?

[5 hole]

funny, I had set the fan to lo just to get some air circ in trailer. After switching it to AC then to Furnace, I did not realize that the fan setting would still function when not on Fan.... now I know!