H1 error every single year from past 3 years

[Pepper0ni]

Every single winter I face the same issue with H1 error on my 2nd generation heat link. 
I have 2 heat links at home - one for each floor. The 3rd generation runs all good without any issues. It’s the 2nd generation one which always has problems. 
Tried all the fixes - when I reset pairing ( after alternating orange and green light), it connects for literally 2 mins with the thermostat and gives the H1 error again.  Last year I was resetting the heat link manually almost every day. 
Getting very frustrated with this - would I have to replace the heat link to a newer model?

[Frustratedddd]

Unusual this situation as the 2nd Gen are bullet proof, and the 3rd Gen have issues.

Have you ever done a full factory reset?

[Jeremyg]

Hi folks!

@Frustratedddd thanks for your assistance.

@Pepper0ni thanks for reaching out to the community. I am sorry to hear that your Nest Thermostat 2nd generation has the H1 error code, but no need to worry; help is here. We appreciate all of your previous troubleshooting efforts. Before continuing, I need to know a few things:

• How is the Heat Link being powered when you're trying to pair it?
• Did you try to take the Heat Link out of Manual Mode?
• When was the thermostat installed?
• Is this a replacement thermostat display?
• Has there been any recent work done on your heating system?

I'll be waiting for your response; any additional details you can provide will be helpful.

Best regards,
Jeremy.