I have BMp3000 board with a Carrier heat pump and a gas furnace backup im having a hard time to get my furnace to start running when the temp drops below 40 my heat pump is still running (and cant keep the house warm) instead of my gas furnace. I have a oas connected to the board and set for around 45 degrees any help would be great. Dip switch settings are currently set to:
L
L
L
L
L
L
R
L
Do both thermostats have to call for heat (its a 2 zone setup) in order to kick in secondary (gas) heat?
Thanks