Heat/ac

[Bezzola]

When i turn my furnace on or my a/c they both run at the same time.
Has anyone run into this before

[Bezzola]

I should have said what kind it is
Dometic in a forester class C

[MR.M]

T-stat setting change to auto fan

[cavie]

Originally Posted by Bezzola

When i turn my furnace on or my a/c they both run at the same time.
Has anyone run into this before

Are you saying that when you start the AC that the furnace comes on also?

[Bezzola]

Yes

[Bezzola]

Ok ill see if i can see that on my T stat

[JLeising]

As I remember - Set thermostat to "Fan". Use + or - to see choices - "Hi", "Lo", and "Au" (auto), as I remember. Choose "Au". Set thermostat to heat or cool - fan will cycle on and off with the furnace or the AC.

[Garrette]

Does the AC and gas furnace both come on when you select Heat?

[bikendan]

One of the most common problem on the Forum.
Easily fixed by setting the thermostat to AUTO.
Your thermostat manual should explain it.

[Bezzola]

Perfect thats what what it was thank you for the help