Wireless Smart Thermostat, Hot Water
Honeywell Home T6R-HW Review

Heating and hot water  |  Wireless receiver box  |  OpenTherm or 24-230V on/off  |  2.4GHz Wi-Fi  |  Resideo app

Overview

The Honeywell Home T6R-HW is a wireless smart thermostat that controls both heating and stored hot water. Resideo, which makes Honeywell Home products, sells it as a table-stand kit (Y6H920RW4026) and a wall-mounted kit (Y6H920RW5031); the only difference Resideo states between them is the mount. It talks by 868MHz radio to a two-channel wireless receiver box, and the two come pre-bound. Resideo lists a large touchscreen, 7-day and 5/2-day schedules with up to 6 time periods a day, and 6 hot water on/off periods that are separate from the heating.

The receiver box needs 230V mains power and is wired to the boiler, and Resideo’s installation guide shows the wall-mounted thermostat on a 230V wall power supply. Resideo says these must be installed by a competent person with the mains power switched off. The thermostat uses 2.4GHz Wi-Fi and the Resideo app (Resideo’s older user guide calls it the Honeywell Home App), but Resideo says Wi-Fi isn’t required for it to work as a standard programmable thermostat. Resideo’s T6R-HW product pages list Apple Home and Amazon Alexa, and its UK T6R pages, which list both T6R-HW kits, also name Google Home and IFTTT. It works with 24-230V on/off and OpenTherm appliances such as gas boilers, combi boilers and heat pumps, but not electric heating (240V).

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Key Features

✓Controls heating and stored hot water (2 channels)
✓Two-channel wireless receiver box, pre-bound to the thermostat
✓Large touchscreen for scheduling and overriding the temperature
✓7-day and 5/2-day schedules with up to 6 time periods a day
✓6 hot water on/off periods, separate from the heating
✓Suits Sundial S, Y and W plan stored hot water systems
✓Works with 24-230V on/off and OpenTherm appliances; not electric heating (240V)
✓Schedule or location-based control (geofencing)
✓2.4GHz Wi-Fi; works as a standard programmable thermostat without Wi-Fi
✓Link multiple smartphones and tablets for the family

Pros & Cons

Pros

+ Heating and stored hot water from one thermostat
+ Receiver box and thermostat come pre-bound
+ Works as a programmable thermostat without Wi-Fi
+ Table-stand or wall-mounted kit
+ OpenTherm and 24-230V on/off support

Cons

− Receiver box must be installed by a competent person
− 2.4GHz Wi-Fi only
− Not for electric heating (240V)

Versions, Kits and What You Need

Resideo sells the T6R-HW as a table-stand kit (Y6H920RW4026) and a wall-mounted kit (Y6H920RW5031). The only difference Resideo states between them is the mount, so check the kit code for the mount you want. Resideo also lists thermostat-only spares: T6H700RW4011 (table stand) and T6H700RW5001 (wall mounted).

Resideo’s T6R-HW product page says it also works with zone valve applications. Its hot water control suits Sundial S, Y and W plan stored hot water systems, and you choose Heating only or Heating + Hot Water when you set it up.

Setup & Installation

Resideo says the receiver box must be installed by a competent person with the mains power switched off. The receiver box and thermostat come pre-bound, so no binding is needed. Resideo’s installation guide then has you select your language on the thermostat, set the clock format, time and date, and select the system type: Heating only or Heating + Hot Water. The installer can then push one of the receiver box buttons to check the valves are switching.

Resideo says the homeowner can complete the Wi-Fi connection on their own. Make sure your Wi-Fi is secure and set to 2.4GHz, download the Resideo app from Google Play or the Apple App Store (the 2020 user guide calls it the Honeywell Home App), press “Create Account” and follow the app instructions. Once it is connected to your Wi-Fi network and the app, the thermostat briefly displays a success message.

Common Problems & Fixes

Running into issues? Our Honeywell Home troubleshooting guide covers step-by-step fixes taken from Resideo’s own support pages, including won’t connect to Wi-Fi or offline, receiver not communicating and rebinding to the receiver.

Who Should Buy It

Anyone with a Sundial S, Y or W plan stored hot water system who wants one wireless smart thermostat to schedule both the heating and the hot water.

Verdict

The Honeywell Home T6R-HW puts heating and stored hot water on one touchscreen thermostat, with a pre-bound wireless receiver box and app control over 2.4GHz Wi-Fi. The receiver box is mains-wired, so plan for a competent installer.

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Need a hand with this?

Resideo says the T6R must be installed by a competent person. A heating engineer can fit it or find the fault, and any work on the boiler itself must be done by a Gas Safe registered engineer. You can compare up to 3 quotes from local heating engineers.

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⚠️ Important: This page is for guidance only. Heating systems vary. Any mains wiring must be done by a competent person with the power switched off, and any work on the boiler itself must be done by a Gas Safe registered engineer. Follow Honeywell Home’s official guidance for your device.