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ChanDo
Community Member
since ‎04-17-2025
a month ago

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Thermostat (3G) with sperate Rh and Rc works only with either Rh or Rc

04-17-2025
I have five wires - 2 for heating and 3 for cooling. Both systems works when I use my 25 yrs old programmable Honeywell thermostat. When I connect the same five wires Rc, G, Y for cooling and Rh, W for heat the Rh shows no power. If I disconnect the ...