Replacing a White Rodger’s 1F78 (Part No. 37-6614B) with a Nest Thermostat.

[Aj4560]

• I am replacing a White Rodger’s 1F78 (Part No. 37-6614B) with a Nest Thermostat. I need help with which wire from the old one will go into which slot in the Nest thermostat. 

[chaconmorales]

Hi Aj4560,

Thanks for reaching out to the Community. I understand that you need guidance to connect your new Nest Thermostat to your system. But no need to worry. Let’s check it out.

Before we get started with further troubleshooting, let me ask you some questions:

1. What Nest Thermostat model are you installing?
2. Are you able to share a picture of your old wiring configuration?
3. What type of system do you have? (Heat Pump or conventional type)

In the meantime, please check the guide to Identify a thermostat wire in case you have doubts regarding the options for your wire configuration. You can also check the following article to verify the Nest thermostat compatibility.

Please keep me posted. 

Best,

Mario