A/C & Heat Control
Thought I had a thermostat problem, got a new one, same problem. Problem is, when I turn on the heat, the A/C fan kicks on too. Yes, I can switch off A/C fan via the breaker, but would rather have ...
Forum Discussion
DarkSkySeeker wrote:
I had perhaps the same problem (perhaps not).
My AC and furnace would run at the same time. Turns out my thermostat had a "differential" setting. D1/D2/D3. It was defaulted to D1. When set to D3 the problem went away.
I supposed it was that the thermostat was no longer looking for set temperatures so close to the actual temperature that it thought the RV needed heat and cooling.
I forget exactly how I change to D3. Something like pressing "up temp" and power at the same time.
See https://www.forestriverinc.com/brochures/0000/0000ThermostatSingleDometicManual.pdf
The D settings have NOTHING to do with the AC fan On or OFF in furnace mode or any other mode. Doug
In the FURNACE mode the system will cycle the RV’s furnace On
and Off based on the room air temperature and the temperature
set-point on the Single Zone LCD thermostat. The system can be
configured to operate using an On/Off differential of either 1 degree
F or 2 degree F. This feature is programmed during the system initialization. See “System Initialization” on page 3.
To set the temperature differential the system must be Off. Press
the “?” button and, while holding it, also press and hold the On/Off
Mode button for three seconds. Release the On/Off Mode button.
Then release the “?” button. Press the “+” button to toggle between
“d1” and “d2”, “d1” for 1 degree F differential and “d2” for 2 degrees F differential.
