Firstly I killed power to the unit at the breaker, swapped over the thermostat, fired the power back up and nothing, couldn't get heat/cool/or fan.
It was cold last night so I tried to put the old thermo back on, and still nothing.
Any help is greatly appreciated.HELP! Tried to change digital thermostat, now no heat....and its cold!?if you didn't kill the power to the to the furnace you probably shorted the low voltage transformer out the power to the thermostat gets it power from the furnace not the heat pump. the red wire is the feed the green is fan the white is heat the blue is common you then should have 3 wires going to the heat pumpHELP! Tried to change digital thermostat, now no heat....and its cold!?it is only 4 wires first i would not of shut the power off it is low voltage but anyway wire the old one back up then turn the dial to the setting you want. 4 wires keep trying the wire combination till you get it right or call a repair guy then leave stuff alone that you dont know anything about.HELP! Tried to change digital thermostat, now no heat....and its cold!?when you powered back up you could have damaged the heat pump circuit
Call a knowledgeable repairman!HELP! Tried to change digital thermostat, now no heat....and its cold!?I am not sure if YOU did the wiring yourself or not as you did not specify.. IF you did the wiring yourself, you probably messed up and I would have to physically see it to know what.... IF.. however, you did not do the wiring yourself.. there should be a RESET button on it.. If so.. press that and start over again.. I have a programmable one myself and I prefer the old fashioned manual oneHELP! Tried to change digital thermostat, now no heat....and its cold!?it appears you possibly did not take note of the wire locations or possibly made a bad connection point in the base..when you took it apart
