Thermostat wiring question
I have a carrier heat pump with a honeywell thermostat. I just purchased a digital, programable thermostat and needed assistance on how to wire the new thermostat.
Current Honeywell thermostat wiring is as follows:
W1-Y Yellow (W1 & Y terminals are jumpered)
W2-E White (W2 & E terminals are jumpered)
New TS21 thermostat
here's a link to the TS21 manual:
Post the model number of your old stat.
If the subbase has a Q674?-???? number, post that as well.
Is this controlling a zone system? It is unusual for both O and B to be in use unless B is actually E or C , and this is not your case.
The old thermostat model number is T8411R (Honeywell).
Here's a link to the manual for it.
See my other response for more details on the existing Honeywell thermostat.
RH (jumpered to RC-red
Y1-yellow(DO NOT JUMPER TO W)
Check your air handler. You should not need the wire that was attached to B on your old thermostat.
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