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View Full Version : Air conditioner comes on when furnace comes on


Tom R
Nov 9, 2007, 11:08 AM
I just installed a new thermostat last spring and everything was fine until I had to turn my furnace on for the first time. (My furnace is a Janitrol forced heat) When my furnace kicks on, I notice that my outside ac unit also kicks on. Is this right or Is it a wiring problem in my thermostat?

XenoSapien
Nov 9, 2007, 04:09 PM
Sounds like a problem in the wiring with the thermostat. Open it to expose the wires. Make sure there are no cuts in the a/c wire that could be touching the heat terminal wires.

XenoSapien