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Thermostat says heating is on but isn’t

Sanchezmo
Community Member

Hello, I wonder if someone could help me. I have had a Nest thermostat for a couple of years. Approximately 6 months ago I had the box that connects to my boiler replaced. This was done for free by Boxt so I would guess it was an issues with the box itself. I think it’s called the Heat Link but I could be mistaken. Yesterday I came home to find that the heating is not working. The thermostats states the heating is on but all the radiators are cold. I have tried resetting the heat link by holding the button for 20 seconds but this has not resolved the issue. I have tried resetting the boiler, that didn’t help either.  I still have hot water so I know the boiler is working. Please help!

My model number is Display-3.4

software 5.9.5-2

16 REPLIES 16

Paul_R
Community Specialist
Community Specialist

Hi there! I'm sorry to hear about it, but I'm here to assist you! Could you please turn your heat all the way off, and all the way up and listen if the Heat Link makes a clicking sound when you turn it up? Also, after that, turn the temperature all the way down again, and listen for the clicking sound. Let me know once you were able to do this.

Sanchezmo
Community Member

Hi, I have tried that but no click. The boiler works as I can turn the heating on when I switch it from timer mode to on but I have to manually switch it off after. There doesn’t seem to be any communication between the nest and the boiler 

Vladut
Community Specialist
Community Specialist

Hi there, just checking in with you. Did you manage to check the last message?

Sanchezmo
Community Member

Apologies for the delay, I have now replied

Vladut
Community Specialist
Community Specialist

Thank you so much for all the details. Can you tell me if you see any lights on the Heat Link?

Sanchezmo
Community Member

Yes they are

Vladut
Community Specialist
Community Specialist

Can you tell me how many you see?

Sanchezmo
Community Member

There are three symbols which are lit up

Vladut
Community Specialist
Community Specialist

Okay that means the manual mode is on. You did mentioned a timer mode in one of the above messages. Do you have any programmer or other thermostats in your house?

Sanchezmo
Community Member

No other thermostats, only the Nest. The timer is on the boiler itself for when you preset what times the boiler/heating turns on with no Nest.  If the heating on the boiler is changed from “off” to “timer” then the heating does not turn on. If it’s changed from “off” to “on” the heating kickstarts. If it is then changed to “timer”, the heating is on full blast and there is no way to regulate it 

Vladut
Community Specialist
Community Specialist

Thank you so much. Can you tell us what type of heating system do you have?

Sanchezmo
Community Member

Worcester Bosche combi boiler

Vladut
Community Specialist
Community Specialist

Okay. In this situation can you please check for the Manual mode to be off and make sure to turn the thermostat to 9 degrees?

UanaC
Community Specialist
Community Specialist

Hello there! Just checking in, do you still need our help?

Sanchezmo
Community Member

Yes thank you it has been sorted 

UanaC
Community Specialist
Community Specialist

Thanks for confirming. I'm glad to hear that everything's been sorted out. In this case, I'll have to close this thread. If anything comes up, feel free to reach us back.

 

Many thanks, Oana.