
Honeywell Home T4R 7-Day Wireless Programmable Room Thermostat | Y4H910RF4003 Smart Heating Control
Honeywell Home T4R 7-Day Wireless Programmable Room Thermostat | Y4H910RF4003 Smart Heating Control
The Honeywell Home T4R 7-Day Wireless Programmable Thermostat Y4H910RF4003 delivers automatic time and temperature control for domestic heating systems with wireless thermostat and receiver operation. Featuring TPI energy-saving control, optimisation algorithms, and large LCD display with up to 6 daily temperature changes across 7-day, 5/2, or single-day programmes.
Key Features
- Wireless RF communication 30m range between thermostat and receiver box.
- TPI (Temporary Proportional Integral) control reduces boiler cycling for efficiency.
- Optimum start/stop and delayed start learns room heating characteristics.
- Pre-bound thermostat/receiver - no binding setup required.
- Away mode with holiday function (1-99 days) and adjustable frost protection.
- Large LCD display with optional backlight and burner ON symbol.
Why Choose Honeywell T4R?
Modern replacement for traditional wired thermostats with advanced energy-saving algorithms and simple programming via intuitive on-screen menus.
ErP Class IV rating ensures compliance while delivering precise control for combi boilers and zoned systems.
Suitable For
- 24-230V on/off appliances (gas boilers, combi-boilers, zone valves).
- S/Y Plan systems and S Plan Plus additional zones.
- Combination boiler installations requiring volt-free switching.
Technical Specifications
- Brand: Honeywell Home by Resideo
- Model: T4R Wireless Programmable Thermostat
- MPN: Y4H910RF4003 / T4H910RF4003
- RF Frequency: 868 MHz
- Thermostat Power: 2 x AA alkaline batteries (included)
- Receiver Power: 230 V AC 50 Hz
- Contact Rating: Volt-free 5(3)A @ 230V AC
- Set Point Range: 5 °C to 35 °C
- Display Range: 0 °C to 50 °C
- Programming: 7-day, 5/2-day, or 1-day (4-6 periods/day)
- Thermostat Dimensions: 97 x 136 x 62 mm (HxWxD)
- Receiver Dimensions: 110 x 110 x 40 mm
- ErP Class: Class IV
- Warranty: 1 year
Installation & Operation
Three-step installation: wire receiver, power up and test, configure thermostat. Supports automatic summer/winter time change, temporary overrides, and full installer menu for cycle rate, limits, and system parameters.
Original: $178.16
-65%$178.16
$62.36More Images

Honeywell Home T4R 7-Day Wireless Programmable Room Thermostat | Y4H910RF4003 Smart Heating Control
The Honeywell Home T4R 7-Day Wireless Programmable Thermostat Y4H910RF4003 delivers automatic time and temperature control for domestic heating systems with wireless thermostat and receiver operation. Featuring TPI energy-saving control, optimisation algorithms, and large LCD display with up to 6 daily temperature changes across 7-day, 5/2, or single-day programmes.
Key Features
- Wireless RF communication 30m range between thermostat and receiver box.
- TPI (Temporary Proportional Integral) control reduces boiler cycling for efficiency.
- Optimum start/stop and delayed start learns room heating characteristics.
- Pre-bound thermostat/receiver - no binding setup required.
- Away mode with holiday function (1-99 days) and adjustable frost protection.
- Large LCD display with optional backlight and burner ON symbol.
Why Choose Honeywell T4R?
Modern replacement for traditional wired thermostats with advanced energy-saving algorithms and simple programming via intuitive on-screen menus.
ErP Class IV rating ensures compliance while delivering precise control for combi boilers and zoned systems.
Suitable For
- 24-230V on/off appliances (gas boilers, combi-boilers, zone valves).
- S/Y Plan systems and S Plan Plus additional zones.
- Combination boiler installations requiring volt-free switching.
Technical Specifications
- Brand: Honeywell Home by Resideo
- Model: T4R Wireless Programmable Thermostat
- MPN: Y4H910RF4003 / T4H910RF4003
- RF Frequency: 868 MHz
- Thermostat Power: 2 x AA alkaline batteries (included)
- Receiver Power: 230 V AC 50 Hz
- Contact Rating: Volt-free 5(3)A @ 230V AC
- Set Point Range: 5 °C to 35 °C
- Display Range: 0 °C to 50 °C
- Programming: 7-day, 5/2-day, or 1-day (4-6 periods/day)
- Thermostat Dimensions: 97 x 136 x 62 mm (HxWxD)
- Receiver Dimensions: 110 x 110 x 40 mm
- ErP Class: Class IV
- Warranty: 1 year
Installation & Operation
Three-step installation: wire receiver, power up and test, configure thermostat. Supports automatic summer/winter time change, temporary overrides, and full installer menu for cycle rate, limits, and system parameters.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Honeywell Home T4R 7-Day Wireless Programmable Thermostat Y4H910RF4003 delivers automatic time and temperature control for domestic heating systems with wireless thermostat and receiver operation. Featuring TPI energy-saving control, optimisation algorithms, and large LCD display with up to 6 daily temperature changes across 7-day, 5/2, or single-day programmes.
Key Features
- Wireless RF communication 30m range between thermostat and receiver box.
- TPI (Temporary Proportional Integral) control reduces boiler cycling for efficiency.
- Optimum start/stop and delayed start learns room heating characteristics.
- Pre-bound thermostat/receiver - no binding setup required.
- Away mode with holiday function (1-99 days) and adjustable frost protection.
- Large LCD display with optional backlight and burner ON symbol.
Why Choose Honeywell T4R?
Modern replacement for traditional wired thermostats with advanced energy-saving algorithms and simple programming via intuitive on-screen menus.
ErP Class IV rating ensures compliance while delivering precise control for combi boilers and zoned systems.
Suitable For
- 24-230V on/off appliances (gas boilers, combi-boilers, zone valves).
- S/Y Plan systems and S Plan Plus additional zones.
- Combination boiler installations requiring volt-free switching.
Technical Specifications
- Brand: Honeywell Home by Resideo
- Model: T4R Wireless Programmable Thermostat
- MPN: Y4H910RF4003 / T4H910RF4003
- RF Frequency: 868 MHz
- Thermostat Power: 2 x AA alkaline batteries (included)
- Receiver Power: 230 V AC 50 Hz
- Contact Rating: Volt-free 5(3)A @ 230V AC
- Set Point Range: 5 °C to 35 °C
- Display Range: 0 °C to 50 °C
- Programming: 7-day, 5/2-day, or 1-day (4-6 periods/day)
- Thermostat Dimensions: 97 x 136 x 62 mm (HxWxD)
- Receiver Dimensions: 110 x 110 x 40 mm
- ErP Class: Class IV
- Warranty: 1 year
Installation & Operation
Three-step installation: wire receiver, power up and test, configure thermostat. Supports automatic summer/winter time change, temporary overrides, and full installer menu for cycle rate, limits, and system parameters.



















