Google Nest Learning Thermostat Compatibility with W/E Wire Systems

[jmangum]

Hello,

My heat pump thermostat wiring uses a single white wire marked W/E on my current Emerson thermostat. Photo attached. The Nest wiring compatibility tool did not list an option for a W/E wire, but does list separate W and E wires. What is the proper selection in the compatibility tool for a system that contains a combined W/E wire? Most importantly, is my current system wiring compatible with Nest thermostats, and specifically the Nest Learning Thermostat. Thank you!

Jeff Mangum

[CoolingWizard]

The connector W/E is W for heating or E for emergency heat. Your system has 2-stages of cooling (Y and Y2) and the W/E is most likely the electric heat strips programed as emergency heat. For the nest configuration tool:

RH-Red Wire ; Power IN

O/B-Orange Wire; Reversing Valve Control

Y- Yellow wire; Compressor Contactor Control

G- Green Wire; Blower Fan Control

E- White Wire; Electric Heat Control

C- Blue Wire; Power Common

Y2- Black Wire; Cooling Stage 2 control

Ken, The AC Cooling Wizard

[jmangum]

Thank you! -- Jeff

[Markjosephp]

Hello folks,

Thanks for your assistance, Ken. Big help!

@Jeff, I wanted to ensure that everything was covered here. How's your thermostat? Were you able to install it successfully? Give us a shout if you need more help.

Best regards,

Mark

[CoolingWizard]

Jeff, I would like verify your outdoor system. Can you please go take a picture of the manufacturer label that shows the make, model and serial number and post it here please. If you notice the “*” after the Y2, that denotes a variable programmable connector. I wan to check your outdoor unit to make sure it has 2-stage compressor in it. Thank you.

Ken, The AC Cooling Wizard

[jmangum]

Thank you for all of the input. I am not at the location where the heat pump is located, but I can tell you that it is an Amana 16 model ASZ16048 two-stage heat pump.

Note that I was only wanting to verify that a Google Nest thermostat would work with my heat pump. Thank you for all of your help.

-- Jeff

[CoolingWizard]

Your system is defiantly compatible with the Nest Learning Thermostat.

The AC Cooling Wizard.

[Markjosephp]

Hello there,

I appreciate your help here, Ken.

Thanks for letting us know, Jeff. Please give us a shout if you need more help, and we'd be glad to know what the result is.

Thanks,

Mark

[Markjosephp]

Hello jmangum,

Checking back in — how's it going? Still need our help? Let us know so we can assist you right away.

Best,

Mark

[jmangum]

Thank you. I think that I have the information I need.

-- Jeff

[Markjosephp]

Hi jmangum,

Sounds great! I'm glad you've got the answer you're looking for. If you still require assistance, please let us know; otherwise, I'll lock this thread in 24 hours.

Best regards,

Mark