Nest repairs Greater London and areas within the M25
Nest Heat Link replacement.Expert help in London.
No status light, an H71 message or heating that won’t respond? Get an engineer to check your 3rd-gen Nest system, replace a faulty Heat Link where needed and test your heating before leaving.
From £149
Fitted. Paired. Tested.
A refurbished replacement UK 3rd-gen Heat Link, installation and reconnection to your Nest display. Heating and hot water tested where your system supports it.
Prefer to speak? Call 020 3835 5003
Something stopped working? Start here.
These signs help us narrow down the problem. They don’t, on their own, confirm that the Heat Link needs replacing.
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No status light
For a 3rd-gen Heat Link, we check the power supply and wiring before deciding whether the unit has failed.
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H71 or lost connection
Your display can’t connect to the Heat Link. It may need reconnecting; replacement depends on what our checks find.
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Heating not responding
We check the controls and wiring, including intermittent switching or hot water that isn’t responding as expected.
Not sure which Nest you have? Send a photo.Show us the front of the Heat Link, the thermostat screen and any error message, plus your postcode. Leave electrical covers in place.
Clear prices. The right visit for the fault.
Replacement, reconnection or diagnosis. We’ll help you choose the appropriate service.
Heat Link replacement
A refurbished replacement UK 3rd-gen Heat Link, fitting, pairing and testing.
From £149
View replacementPairing-only visit
For a working Heat Link that needs reconnecting to the Nest display.
£99
View setup serviceA £25 Congestion Charge Zone surcharge may apply. Additional wiring, valve or boiler faults, damaged terminals and unsafe existing controls may need a separate quote.
Your engineer visit. From checks to handover.
Check the fault
We identify the system and check the power supply, wiring and controls. Power is safely isolated before any electrical work.
Replace and reconnect
If replacement is needed, we fit the compatible Heat Link and pair it to your display. If the unit is working, we check its connection.
Test and explain
We test the heating and, where fitted and accessible, hot water controls. Then we explain the work and any other faults found.
Greater London and areas within the M25.Check the live diary for appointments at your postcode.
Ready for the engineer.Please provide access to the boiler, Heat Link and thermostat, and let us know about parking.
A few questions. Clearly answered.
How much does Heat Link replacement cost?
Replacement is from £149, including the unit, fitting, pairing and testing. Pairing-only visits are £99 and diagnostic call-outs are £99. A £25 Congestion Charge Zone surcharge may apply. Additional faults may need a separate quote.
Which Nest system is this service for?
This replacement service is for the UK 3rd-generation Nest Learning Thermostat’s Heat Link. Nest Thermostat E and other generations use different hardware. If you are unsure, send photos of both the thermostat and Heat Link so we can advise.
Does no light always mean the Heat Link has failed?
No. On a 3rd-gen Heat Link, the power supply and wiring need checking as well as the unit itself. A Nest Thermostat E Heat Link can normally have its light off, so the model matters. We confirm the cause before recommending replacement.
How long does the visit take?
A straightforward replacement usually takes around 30–60 minutes, including checks, pairing and testing. More involved faults can take longer. Choose your appointment from the live diary.
Will my display, app and schedules still work?
We reconnect the Heat Link to your existing compatible display. Your schedules are normally retained, and we check app control where needed. A Heat Link replacement does not repair a separate display or Wi-Fi hardware fault.
Can you check the hot water too?
Yes, where your Nest system controls a hot-water cylinder. We test the hot-water channel and related controls where the wiring and access allow. We also check that the boiler responds to heating requests.
What if the Heat Link looks burnt or damaged?
Leave electrical covers in place and tell us about any burnt plastic, water damage or visible damage before booking. Send a photo of the outside if it is safe to do so. Damaged wiring or terminals may need additional work beyond a standard replacement.
Can you fit a Heat Link I already have?
Yes, if it is the correct UK part and compatible with your Nest system. Send a photo of the replacement and your existing thermostat first, so we can confirm suitability and the right installation service.
Need to identify a light? Google’s guide to Heat Link lights.
Get an engineer to your home.
Check the next available appointment, or send a photo if you’d like us to look at the problem first.
Prefer to speak? Call 020 3835 5003
