Our heat won't come on. The AC cooling side on thermostat works but the heat side won't come on. At first the #1 unit was all that would work on cooling and now the # 2 unit will work on cooling also,...
Check the connections on the outside panel of your gas furnace....sometimes they loose their connections. Make sure the propane is turned on and is operating to the inside range, no air in lines. Listen for the igniter outside in the gas furnace...if it is not trying to ignite (clicking) the problem is somewhere in the electric circuit, fuse, thermostat, connectors, etc. The gas furnace only works with the #1 thermostat circuit.
If you have an EMS it may have dumped one of the circuits.