Originally Posted by Deep Water D
If you set the thermostat 4 degrees above the temp in the coach the LP furnace kicks in.
if the temp set or desired is 3 or 4 degrees more than current room temp it will kick on both heat pump and the gas furnace
and in a few minutes the gas will kick off if temps have risen by a few degrees, each unit or brand has its own settings internally
also if just the heat pump is running and room temps fails to rise x degrees in x amount of time it will kick on gas to supplement.
if you want the gas furnace not to come on, try setting the desired room temp to 3 degrees above the actual room temp, then watch and see if room warms up. Then you can increase room temp gradually if desired
my air excell book has to much detail for the above. so thats it in a nutshell to