Have HVAC Questions? Ask an HVAC Expert for Answers
Can you tell me where each wire went on old thermostat? And model of new thermostat?
OK lets se what we can do. THe UHSA I an electric furnace. What is model on your ac outside.
You will have to look to see what colors are ran between units but here is how they go based on colors in unit.
Air handler Red to R with a jumper to RC at thermostat
Air handler Brown (tape off) at thermostat but run to contactor in outdoor
Air Handler Green and black to G at thermostat
Air handler white/blue and white black tied together and to W at thermostat
Yellow from thermostat to contactor in outdoor unit.
SeeE diagram below
THis is for an air conditioner on,non heat pump. Get me model on outdoor and I will verify you have an air conditioner and not a heat pump.
1. What is model on outdoor unit?
2.SEnd me a pic of the other end of these wires at air handler
I am suspecting your outdoor is a heat pump since you have o many wires.If so the 2300 is not a good replacement.Notice it has no EMER Heat selection.Give me model on outdoor unit so I can verify.The HM2417 is air handler
Give me model on outdoor unit so I can verify
OK the 2300 is not compatible .You need a 2 stage heat/1 stage cool thermostat.ee excerpt from manual
If you want to reconnect the old we can do that, but I need a picture showing me where those wires connect at other end.
The problem is that their is no industry standard.For example one tech may use pink for common where another text ay use pink for ac and blue for common. Guessing can cause you to do a lot of damage to control board and transformer.