Hello all back with a new problem. I'm currently running a wifi thermostat for heat only with an external 24v transformer because the gas heat only has two wires running to the Thermostat so no chance to grab a third wire for "C" this works fine. Now I want to add my AC unit's thermostat to the wfi. the problem is when they installed the AC handler they only ran a 3 wire to the AC thermostat so again not chance to get a "c" wire back to the Handler.
Now what? I now I have two separate systems and I'm sure I can't just take the Y & C wires to the wifi and have it work, can I?
Thanks
Now what? I now I have two separate systems and I'm sure I can't just take the Y & C wires to the wifi and have it work, can I?
Thanks