I had a goodman thermostat model # HPTD18-60. It quit working so I tried to replace it. the new thermostat i got was a honeywell RTH3100c. After installing i tried to see if the heat would kick on but nothing happened... what should I do..
I made sure all wire were connected to the appropriate places.. marked wires before replacing... it still did not work.. any other suggestions checked breakers for furnace.. not sure what else to check..
if you don't post the old terminal and what connected to on the new stat we can't help, you telling us that they are correct doesn't prove they are correct. check for a low voltage fuse blown in indoor unit as stated before. If you don't want to post terminal designations. Other than that, with out more info we can't help.