Tuesday, October 25, 2011

Thermostat changed, furnace works, A/C does not?

This past winter we changed the thermostat. Wires weren't marked before removal, but connected up and furnace, heat and fan worked. Red, White, Green, and Blue wires, Connected as follows: R=Rh with jumper to Rc, W=W, G=G, B=Y. Followed instructions with new thermostat, substituting the Blue wire for the Y. Checking inside the furnace all seems correct since there is a Blue wire connected to the Yellow spot.

A/C unit worked the summer before the thermostat switch, and wasn't tested due to the thermostat switch being in the winter. Come this summer, the A/C won't come on. Any suggestions? I'm at a loss. :(
Thermostat changed, furnace works, A/C does not?
Call a professional, if you try to fix it you'll only screw it up worse than it is.
Thermostat changed, furnace works, A/C does not?
you probly didnt buy the right kind of thermostat, ive screwed it up many times. make sure you have like single or dual stage type
does the filter need to be changed? that happen to me, we called someone inand all he did was take out the filter ans say we needed a new one. They are pretty cheap, try that before calling someone!
make sure it is a duel control thermostat