Geothermal unit

[mrb710]

Ground source heat pump. I wired a new Nest Gen 4 with the same connections as my previous nest gen 1. Now my fan runs constantly and my well water pressure is inconsistent.  Help???

[GabrielaG]

Hi @mrb710,

Thanks for reaching out to the Google Nest Community. I'm sorry to hear you're experiencing issues with your Nest Learning Thermostat 4th gen, specifically the fan running constantly and inconsistent water pressure. I'm glad to help you.

To determine the most effective troubleshooting, I need a little more information. Could you please answer the following questions?

• Are there any error codes displayed on the thermostat screen or in the app?
• Have there been any recent modifications to the HVAC system?
• Have you experienced any recent power outages or power issues?
• Can you please send a picture of the Nest Thermostat's current wiring?

 If you have any additional details that might be helpful, feel free to share them with me.

Regards,

Gabriela

[mrb710]

Thanks for the reply!  No error codes, modifications or power issues.  I have images of the previous Nest wiring and the current wiring but this forum doesn't seem to allow me to upload them.  My previous Nest used Y1, G, OB, W1, W2, C and Rh and I wired my Nest 4th Gen the same way.

[mrb710]

Oh I figured out how to upload photos!