Nest Gen 3 . No heating or hot water.No lights on Hub but power goes to it.

[hovercamracing]

I have work up this morning with no heat or hot water. The thermostat does not conect to the hub and there are no lights on the hub. I removed the cover and plugged in usb lead and light come on but no heating or hot water when it it is turn to manual.Do i need to reset hub or do i need a new one if so where do i get one from regards David

[Frustratedddd]

The USB connection will not help you, as you have a faulty Heat Link.

Well known problem, and Nest are fully aware. The fault is a component inside, and without a replacement it will not work.

Resetting will do nothing, the Heat Link is faulty.

Quick fix is Ebay

[DragosC]

Hi there @hovercamracing 

Thanks for reaching out and thanks for letting me know..Also, thank you @Frustratedddd for assisting. Could you tell me please when did the situation start occurring first and when was the thermostat installed?

Also, please answer to the following questions:

Are there any lights on the Heat Link? Does the boiler activate when calling for heat by pressing the Heat Link's button to activate 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, has the power been restored?
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.)
Could you tell us please if you've checked on the breaker switch and fuse box?
Any blown fuse in there? Have you tried to turn the breaker switch off and on again? Any difference?

[hovercamracing]

Thanks for your responce . There are no lights unless you conect the mico usb. The manaul button does not work even with the mico usb conect to power. No power cuts or service work carried out. I had had no other responces to my emails or message posted o here apart form the assitance form Frstrateddd . After two days of freezing cold i rung the customer support telephone number (old fashened i know) and got a fantastic reponce. They said they would send me a new hub which arrived next day delevery and said thy would pay for somone to come out and get my heat on until it arrived and also pay for the new hub to be fitted so after i warmed up i was happy again . The only negative was the wait without heat and the fact i will have to wait up to 30days in order to get a refund on the £180 i have had to lay out.Seems by looking on line it is a common problem with a diode failing on the PU . Thanks for your responce regards David

[AlexD]

Thanks for keeping us posted. I am glad to hear you managed to get in touch with my colleagues to get things back on track. Just in case here is our support link: https://bit.ly/3apBRyV . Here you can find all the ways you can reach us, including phone, chat and social media links. Feel free to reach out to us here or on any of our channels if there is anything else we can assist with. 

[DragosC]

Since I haven't heard from you in a while, I'll have to close this thread. Should anything else come up, please open another thread and we'll take it from there. Have a good one and stay safe!