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Nest wiring help

Anna8
Community Member

‎08-15-2023 10:57 AM

I have a honeywell TH8320R1003 thermostat for a heat pump / AC unit (Arcoaire). It has just 4 wires (G, C, R, and Aux/E) and a bridge between R and Rc. How should this be wired to work with the Nest Thermostat? (Options are Y C W G R   OB-*)

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Anna8
Community Member

‎08-15-2023 11:02 AM

20230814_204256 (2).jpg

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CoolingWizard
Platinum Product Expert
Platinum Product Expert

‎08-15-2023 02:47 PM

The picture you posted is not wired for a heat pump.  A heat pump thermostat would need a wire attached  to Y and a separate wire on O/B. So your wires should be Rc, C, G, Y, W2/Aux, O/B

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
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