E160 error on hot days but system is working

[MGardner]

On hotter days the thermostat gives me an error of E160 for wiring. But the A/C is running fine. However, I can not adjust temp. Come morning time the error is gone and the screen is back to normal. Xcel energy has added some contraption to the A/C unit but otherwise we have had no change. Any thoughts?

[MplsCustomer]

@MGardner 

If you have Xcel Energy's Saver's Switch (as we do), maybe when Xcel activates it on hot summer days to cycle your air conditioner off at 15 to 20 minute intervals, it causes the Nest Thermostat to think "No power to Y1 wire detected (cold weather shutoff)":

https://mn.my.xcelenergy.com/s/residential/heating-cooling/savers-switch

[Jhonleanmel]

Hi everyone,

Thanks for posting, and I’m sorry for the delayed response .

@MplsCustomer, thanks for helping out.

@MGardner, chiming in to ensure everything is good here. Have you had the chance to check the suggestion above? If yes, how is it?

Best,
Mel

[EdwardT]

Hi folks,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[EdwardT]

Hi folks,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward