One comment

  1. Avatar Jlefler says:

    I have wired a 2nd thermostat to existing one to have new thermostat in a more central location. I’ve done this on several other occasions but this has me puzzled. When I turn fan switch to “on”, on 2nd thermostat, the condensing unit comes on in heat mode. I’ve turned original thermostat off as to only use new one. I cannot figure out why this is happening. Both thermostats are Honeywell… Just slightly different.

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