topic Re: Error E159 message in Nest Thermostats

Error E159 message

LaurelG — Sun, 19 Feb 2023 01:44:29 GMT

We got this message and tried to take out the blue wire and reinstall it. I can’t read the previous posts about how to fix this.

Re: Error E159 message

Patrick_Caezza — Sun, 19 Feb 2023 03:36:59 GMT

The E159 error means no power is detected on the C wire.

Was it working before?

Check that the wire is connected to the C terminal on the control board in the furnace/air handler.

Re: Error E159 message

Markjosephp — Wed, 22 Feb 2023 21:28:41 GMT

Hello there,

I wanted to stop by and see how I could help.

Thanks for lending a hand, @Patrick_Caezza.

@LaurelG, could you also help us check your thermostat's power readouts on the Technical Info settings? Also, I found an article about the wiring report with troubleshooting steps. Let us know if you need more help.

Regards,
Mark

Re: Error E159 message

Jhonleanmel — Mon, 27 Feb 2023 10:53:42 GMT

Hi folks,

Chiming in to see if you still need assistance with this. Let us know if you have additional questions ― we'd love to help.

Best,
Mel

Re: Error E159 message

Markjosephp — Tue, 28 Feb 2023 19:08:34 GMT

Hello LaurelG,

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

Regards,

Mark