Google Nest · Thermostats
Google Nest Thermostat E Installation in London
Updated
The Nest Thermostat E splits the job differently from the Learning Thermostat. Its battery-powered Heat Link E takes over the old room thermostat's spot on the wall, while the display sits on a stand and talks to it by radio. Google still sells the Thermostat E in its UK store (checked 1 November 2026) and calls it easy to install yourself; a vetted JACK pro in London does the wiring, pairing and testing for a fixed price shown in the JACK app before you book.
In short
Yes. A vetted JACK pro in London fits the Nest Thermostat E by taking your wired room thermostat off the wall and connecting the Heat Link E to two of its wires, Common and Normally Open, or an OpenTherm pair, then pairing the display on its stand. It suits combi and heat-only boilers but cannot control a hot water cylinder. Where there is no room thermostat to replace, Google's UK installation terms put the Heat Link E by the boiler, and JACK treats wiring at the boiler as a job for a Gas Safe engineer.
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Nest Thermostat E: key facts
- Google Store UK
- Still sold by Google in the UK, with an 'Add to basket' button when checked on 1 November 2026 Source: Google Store UK: Nest Thermostat E
- Google on fitting it
- 'Easy to install yourself', on Google Store UK's thermostat comparison Source: Google Store UK: compare Nest thermostats
- Heat Link E
- Replaces the existing thermostat on your wall; battery powered with a built-in temperature sensor; links to the display over Thread radio only Source: Google Nest Help: Heat Link for Nest thermostats in Europe
- Heat Link E wiring
- Two wires only: the old thermostat's Common (C) and Normally Open (NO), or OpenTherm OT1 and OT2; spare cores go into terminal blocks Source: Google Nest Help: Nest Thermostat E Heat Link wiring
- Heat Link E batteries
- Two AA Energizer Lithium L91 cells; Google warns that alkaline or rechargeable cells drain quickly Source: Google Nest Help: replacing the Heat Link E batteries
- Systems on Google's UK spec page
- Combi and heat-only boilers; heat pumps (heating only); zoned systems; district heating with electrical control valves; On/Off or OpenTherm control Source: Google Store UK: Nest Thermostat E tech specs
- Hot water
- No control of a separate hot water tank; on an OpenTherm combi, the hot water temperature can be set Source: Google Nest Help: hot water control with a Nest thermostat
- In the box
- Nest Thermostat E, Heat Link E, power adapter, display, base, trim plate, screws, terminal blocks and an installation guide Source: Google Store UK: Nest Thermostat E tech specs
- Warranty and updates
- Two-year limited warranty; security updates for at least five years from when Google started selling it on its US store Source: Google Store UK: Nest Thermostat E tech specs
Device facts come from Google Nest Help (UK), the Google Store UK and Google's UK installation guide, linked beside each fact. Several Nest models are out of stock or no longer sold in the UK, so these pages are written for the device you already own: check its name on the box, in the app or on its base, and send it with your request. Last checked 1 November 2026.
How the Nest Thermostat E is powered and mounted
Google's 3rd gen Heat Link sits near the heating system; the Thermostat E puts its wired part on the wall. The Heat Link E takes the place of your old room thermostat, uses two of the wires already there and runs on two AA lithium cells, so there is no new supply to find. It has its own temperature sensor, and the display, which ships with a power adapter, reaches it over Thread radio alone.
Which two wires matter depends on the old thermostat. Google publishes a table of Common and Normally Open terminals for common UK and European models, and on some, such as the Drayton RTS1 and the Danfoss RET 230, Common is the terminal marked L. Where the old thermostat switched mains, those wires carry 230 V even though the Heat Link E runs on batteries, so the pro isolates the circuit before the old thermostat comes off and makes safe every core the Heat Link E does not use. For a thermostat missing from Google's table, Google points you to a professional or the old thermostat's maker.
Google's UK installation terms add one more case: with no room thermostat at all, or a receiver built into the boiler, the Heat Link E goes next to the boiler instead. On a JACK booking that boiler-side wiring is treated as a job for a Gas Safe engineer, while the display, the batteries and the pairing stay with the JACK pro. Where a separate programmer still sits in the circuit, the pro leaves it on constant or set so it never cuts across the Nest's schedule.
What the pro checks first
- The make and model of the old room thermostat, read against Google's Common and Normally Open table
- Whether that thermostat switches 230 V, uses volt-free contacts, or already carries an OpenTherm pair
- Whether the home has a hot water cylinder, which the Thermostat E cannot schedule
- Whether a separate programmer, or a receiver built into the boiler, is also in the circuit
- A socket in the room where the display will stand, ideally the room you use most
What the pro does on the Nest Thermostat E
- Circuit isolated and proved dead before the old thermostat is unscrewed
- Heat Link E fixed where the old thermostat was, on C and NO or on OT1 and OT2, with spare cores in terminal blocks
- Two fresh L91 lithium cells fitted in the Heat Link E
- Display set on its stand, plugged in, paired over Thread and joined to your Wi-Fi
- Boiler made to fire and stop from the display, so the switching is proved both ways
- Where the old thermostat switched 230 V, ask your pro for a Minor Electrical Installation Works Certificate
How the Nest Thermostat E installation goes
- 1The old thermostat's model checked against Google's wiring table before the visit
- 2Heating power isolated and the old thermostat removed from the wall
- 3Heat Link E connected to the two matching cores and fixed in place
- 4Batteries in, and the Heat Link E set up in the app
- 5Display placed, paired with the Heat Link E and connected to Wi-Fi
- 6First schedule set with you, and the boiler tested on and off
Before you book: what to send
- A photo of your room thermostat, including any model name printed on it
- A photo of the boiler and its data label
- Whether you have a separate programmer, with a photo of it if so
- Whether you have a combi or a boiler with a hot water cylinder
- Which room the display should go in, and where the nearest socket is
Which terminals become C and NO on common UK room thermostats?
Google's wiring table for the Heat Link E names the two terminals to use on popular thermostats. The pro reads your model from the photo you send before booking.
| Existing thermostat | C (Common) | NO (Normally Open) |
|---|---|---|
| Drayton RTS1-3 or Combistat | L | 3 |
| Honeywell T6360 or T4360B/E | 1 | 3 |
| Honeywell BDR91 | A | B |
| Hive SLR1 | 1 | 3 |
| Danfoss RET 230 | L | 3 |
| Heatmiser neoStat | A2 | L |
| Potterton PRT 2 | 2 | 3 |
From Google Nest Help's Thermostat E Heat Link wiring page, read on 1 November 2026. An OpenTherm thermostat uses OT1 and OT2 instead.
How is Google Nest installation priced in London?
A vetted pro prices your Nest job from the model and your photos, and the JACK app shows that fixed price before you book.
Full pricing guide for Google Nest installationFrequently asked questions
Does the Nest Thermostat E control hot water?
Only on an OpenTherm combi boiler, where Google lets you set the hot water temperature. It cannot switch or schedule a separate hot water cylinder: Google's table lists hot water control with a separate tank as a 3rd gen feature only. In Google's UK range, cylinder control needs the 3rd gen Learning Thermostat and its mains Heat Link.
Can the Nest Thermostat E be installed on two wires?
Yes. The Heat Link E only ever uses two: Common and Normally Open from a switching thermostat, or OT1 and OT2 from an OpenTherm one. The display itself is wireless and needs just its stand and power adapter.
Is the Nest Thermostat E still supported?
Yes: Google still lists it as receiving security updates (checked 1 November 2026). Its promised minimum of five years from its first US sale has passed, and Google's April 2025 end-of-support notice named only the 1st and 2nd gen Learning Thermostats, not the Thermostat E.
Does fitting a Nest Thermostat E need a Gas Safe engineer?
Not for the usual job. Swapping a wall thermostat for the Heat Link E on its existing wires is outside the gas regulations, whose code of practice from the HSE names replacing electric thermostats as an example. Only where there is no room thermostat, or the receiver is built into the boiler, do Google's UK installation terms put the Heat Link E next to the boiler, and JACK sends any wiring into the boiler itself to a Gas Safe engineer.
How much does Google Nest Thermostat E installation cost in London?
It is a fixed price for your Nest Thermostat E, worked out by a vetted pro from the model, a photo of where it is going and what power is there now, and shown in the JACK app before you book. Other devices can go on the same booking for one price. If you would rather pay for time, hourly hire for smart home is typically £45–£95 per hour as a guide.
Often booked together
Nest Learning Thermostat (3rd gen) installation
The UK and Ireland 3rd gen with its mains Heat Link: the Heat Link goes where your programmer was, the display on the wall or a stand.
Nest Heat Link installation
A failed or badly placed 3rd gen Heat Link swapped or moved on its own wiring; faults inside the boiler go to a Gas Safe engineer.
More Google Nest thermostats
Google Nest thermostat installation
The Nest Learning Thermostat (3rd gen) and the Nest Thermostat E, with their Heat Links fitted on the wiring you already have.
All Google Nest installation guides
Google Nest installation in London: thermostats and Heat Links, doorbells, Nest Cams and Nest Protect fitted by vetted pros. See a fixed price first.
Related services in London
Sources
The device facts and rules on this page come from these pages, checked on 1 November 2026.
Jack All Trades (JACK) is an independent London service for booking vetted local pros. It is not part of, affiliated with or endorsed by Google LLC, and it is not part of Google's Nest Pro programme. Google Nest product names are used only to describe the devices JACK pros install; prices are set by JACK pros, not by Google, and JACK does not sell Nest devices. JACK pros do not open boilers or claim Gas Safe registration.
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