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!  

 

 

[GabrielaG]

Hi @mrb710,

Thank you so much for the update and for providing such detailed information about your Nest Thermostats. I appreciate you taking the time to explain the situation, and I'm happy to keep working with you to find a solution.

Please follow these steps to attempt a resolution:

• Turn off the AC power to your thermostat and HVAC system.
• Carefully disconnect and then firmly reconnect all the wires at the thermostat's base.
• Perform a Factory Reset on your Nest Learning Thermostat (4th gen).
• In the Google Home app, remove the Nest Thermostat.
• Finally, set the thermostat up again in the Google Home app.

Please let me know how it goes once you've completed these steps.

Regards,

Gabriela

[mrb710]

I tried all of those steps in order and had no difference in the previous issues. I reinstalled my old Nest and everything is working fine. Weird right?

[GabrielaG]

Hi @mrb710,

Thank you for the update and for sharing this important information. I appreciate you taking the time to complete all the troubleshooting with me. I'm glad to continue helping you.

Since we've exhausted the basic steps, the team would like to learn more about this behavior. When you get a chance, please fill out this form and let us know when you’re finished. We’ll have someone reach out to you via email from there. Your confirmation is crucial to ensuring that I can follow up on your case effectively.

Regards,

Gabriela