My heat link has completely shut down, no lights and cannot restart. Any help?!

[rgaila]

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Original Poster: Pamela Kidd  

My thermostat is saying error H71 cannot connect to heat source.  The heat link is completely dead - no lights on it, no power, will not reset when I hold down the main button.  I have tried switching off the power supply to the unit and then turning it on again but it has not restarted the heat link.  Any advice or do I need to get an engineer in?

[rgaila]

Hi Pamela,

Thanks for reaching out. Let's check a few things:

• What type of Nest thermostat do you have?
• When was it installed?
• Did the issue happen during installation or after installation?
• Are there any lights on the Heat Link? Does the boiler activate when calling for heat by pressing Manual Mode?
• Are you seeing any wiring report or error on the thermostat and/or the app?
• Have you had any recent power cuts in your area? If yes, document the answer to the following questions.
• How long ago was the latest power cut?
• How often do these power cuts occur?
• How long was the power off for? (Be specific.) Do you get an error after each power cut?
• Has the thermostat been on since this power cut?
• Have you recently had service or maintenance on your electrical, plumbing, or heating system?
• If yes, how long was the power off for? (Be specific.)
• Have you tried any troubleshooting steps before contacting us?

Let me know so I can properly help you.

-From Andreaa C, Community Specialist.

[Maisey60]

Snap. Same here. I’ve checked all I can. It’s was working fine, and just stopped! 

[AnaM]

Hello everyone, 

Just checking once more if you need help. Let me know and I'll be happy to assist.

[AlexD]

Hey there, I haven't heard from you in a while so I'll be locking this thread. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community. Thanks, AlexD.

[babsbol]

The same thing has happened to me. No light on the heat link, totally dead, and doesn't respond to holding down the button for 10 or 20 seconds. Can't turn on heat. Doesn't appear to be any reason for this. Engineers are all booked up and not taking urgent call outs. Is there anything I can do?  Appears to be a second generation model. 

[CristianC]

Hey everyone,

Sorry for the late reply. Did you manage to resolve the issue in the meantime? Let me know if I can help.