Thermostat Wiring
I'm thinking of replacing our house's old thermostat. Rookie question but why are there two wires connected to R here and how should the orange wire be labelled?
Nov 4th, 2020 7:55 pm
Nov 4th, 2020 8:08 pm
Nov 4th, 2020 8:14 pm
Nov 4th, 2020 10:16 pm
Nov 5th, 2020 10:18 am
Nov 5th, 2020 10:36 am
It's very common to wire Rh (heat return line) and Rc (cooling return line) together if they go to a common transformer terminal. Some thermostats have a "bridge Rh/Rc" setting or a bridge wire to enable this when you have the two lines connected to separate terminals on the thermostat. In your case you appear to be lacking an Rc label on your orange wire, but that's what it would normally be unless your installer has done something strange at the furnace end.
Dec 15th, 2020 4:02 pm
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