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Nest wiring with multiples wires per terminal

sct
Community Member

Hi I currently have a heater (Williamson GWA-175-N-T) hooked up to a Honeywell thermostat (RTH221B1039) with yellow + green in W and red + black in R and a jumper between R and RC. See photo. How do I wire the Nest?

thermostat-inside-body.jpeg

3 REPLIES 3

Markjosephp
Community Specialist
Community Specialist

Hello sct,

Thanks for reaching out to the Google Nest Community Forum. I'd be happy to take a look into this for you.

It's not ideal for the Nest Thermostats to have a two-wire cord twisted under one terminal. But it appears that your thermostat needed additional power with this setup. To know its compatibility, could you also send us a picture of your heater's wiring configuration from its control panel?

I'll look forward to your response.

Thanks,

Mark

Hi there,

I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Best,

Mark

Hi sct,

I'm just checking in to make sure that you've seen my response. Please let us know if you have any additional questions or concerns before I lock this thread in 24 hours.

Best regards,

Mark