Heat strip comes on with furnace

[Kathy]

When I set thermostat to furnace, the furnace come on, but the heat strip comes on with it.

 

What should I do?

 

Thanks.  Sharon

[Overland]

You probably have the fan set to high or low instead of auto.  The fan speed controls the fan in the AC unit, so you have to keep it set on auto with the furnace so that the AC fan doesn't come on.  It's just a goofy quirk of Dometic thermostats.

[Kathy]

Thank you!

Kathy