Nest thermostat showing no power error

[JoeMoney]

My nest thermostat has suddenly stopped working and is showing an E298 (no power) error. It has worked perfect for about a year but now for some reason has no power.

[Houptee]

What kind of heating/cooling system do you have?

Do you have and know how to use a multimeter to test for 24v AC voltage?

You should have 24-30v AC at the system if you test from R to C. If nothing then look for blown fuse on the board. Or transformer could be bad. Even the main board could be bad. Have to diagnose it using a multimeter is only way.

[JoeMoney]

Thanks Houptee

[aatienza]

Hey JoeMoney,

Checking in — we hope you've got the answer you're looking for. Let us know if you have more questions in mind.
 

I appreciate the help, Houptee.

Thanks,

Archie

[aatienza]

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have. 
 

Thanks,

Archie

[aatienza]

Hello there,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.
 

Thanks,

Archie