Nest Compatibility for 7 Wire

[gadgman1]

 

 

 

[CoolingWizard]

The Nest 3rd Gen has the ability to handle your 7 wires. You seem to have a heat pump system with emergency heat and auxiliary heat unless the Aux is say a humidification system.  The wires I see. 

R - 24VAC Input - Red Wire

Y - Cooling - Yellow Wire

G - Blower Fan - Green Wire

C - Common return - Blue Wire

E - Emergency Heat - Black Wire

Aux/W - Auxiliary Heat - White Wire

O/B - Heat pump Reversing Valve - Orange Wire

[Patrick_Caezza]

Your thermostat is not compatible with the Google Nest Thermostat, it will only work with the Nest Learning Thermostat, 3rd Gen

Try this wiring if you get the Learning Thermostat.

Yellow - Y to Y1

Greem - G to G

Blue - C to C

Red - R to Rc

White - E to * (set for emergency heat)

Black - AUX to W2/AUX (set as AUX heat)

Orange - O/B to OB

[MelbaDT]

Hey folks, 

Appreciate your detailed responses, Patrick_Caezza and CoolingWizard. 

gadgman1, I'm jumping in to ensure everything is covered here. Have you had the chance to check on the responses above?

Best, 

Melba

[MelbaDT]

Hey gadgman1, 

Checking back in — how's it going? Still need our help here?

Best, 

Melba

[MelbaDT]

Hi, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba