AC and Heat dead after new thermostat installed ... please help, its getting cold :)
Removed old thermostat by cutting wires, installed new andnothing.
Checked wires and diagram- everything ok.
Put back the old one, same thing.
Old thermostat controlled both AC and Heat.
Did not disconnect power while doing it yes, I know.
Fuses are ok, both in panel and in thermostat.
Not my Trailer: ( neighbors: ( need ideas.
What type of trailer and what heater and AC are on the unit? I am guessing that cutting the wires while power was on could have damaged the control transformer if you cut them all at once. First thing to do is to look for control voltage from the unit. Do you have a meter to test for voltage from the transformer?
Find out what make/model of AC & thermostat you have and find a wiring diagram (online) that shows what voltages are supposed to be there. (For starters, probably red to white should be 12v DC.) If you don't have voltage, trace the red wire back to where but comes from (in the AC I expect).