Honeywell Home T4R 7-Day Wireless Programmable Room Thermostat | Y4H910RF4003 Smart Heating Control

The Honeywell Home T4R 7-Day Wireless Programmable Room 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.