Heater & Air conditioner

[FrankG]

I HAVE A 16 vengeance 29V with a Air conditioner and heater. It has a Dometic thermostats. This morning we turned the heater on for the first time 61 degree F. Heater ran just fine but the air conditioner fan came on also. Is this something I can fix?

[Bama Rambler]

Lots of reports of this on the forum.
Cycle through the modes until you get to Fan and then +or- until it says Auto and that'll fix your problem.

If you leave the fan in Hi or Lo the A/C blower will run anytime the furnace runs.
It's designed that way for some reason.