I removed the thermostat before marking the wires and I need to know if anyone knows which wires go where?
Hello Kaitlin: It depends on what wires come from the furnace. You will need to go to the furnace and look at the wires. If it is a gas furnace (with air cond.), there should be a R terminal with a red wire attached this is the power line. The W terminal (heat) has a white wire attached. The G terminal (fan) should have a green wire. The C (common) terminal may have a blue or black wire (or not). The Y (cooling) terminal may have a yellow wire. If it is a heat pump, the wires will be R (power), Y (compressor), O or B (reversing valve), G (fan), C (common), the backup heat has different designations, from W2 to Aux, others. There should be a legend on the furnace to assist. Good luck.
