The Honeywell Home DT4R White Wireless Room Thermostat Spare (DTS42WRFST20) is a replacement wireless thermostat head designed for compatible Honeywell Home heating control systems. Featuring a slim, modern white finish, a clear LED segment display and easy-to-use touch controls, it provides convenient temperature adjustment for existing wireless heating installations.
This model is supplied as a thermostat head only, with no receiver box included. It is intended as a replacement for an existing DT4R thermostat or as an additional thermostat for compatible multi-zone systems. It supports compatible evohome and HCC100 systems, along with suitable 24–230V on/off heating and cooling applications.
Honeywell Home DT4R Range Wireless RF White Finish Spare Thermostat Only
Important – Thermostat Only
This product does not include a receiver box. Please ensure you have a compatible Honeywell Home receiver or control system installed before ordering.
Key Features & Benefits
1. Replacement DT4R Wireless Thermostat
Designed as a spare or replacement thermostat head for compatible Honeywell Home wireless heating control systems, helping restore or expand an existing installation.
2. Compatible with evohome and HCC100
Works with compatible Honeywell Home evohome and HCC100 Underfloor Multi-Zone Controller receivers, supporting suitable multi-zone heating arrangements.
3. Clear LED Segment Display
The large LED segment display provides an easy-to-read temperature interface, while the auto-off display and wake-up button help conserve battery power between uses.
4. Convenient Touch Controls and Eco Mode
Backlit touch controls make temperature adjustments straightforward, while the built-in timed Eco mode applies a temperature reduction to help manage heating use.
5. Wireless RF Communication
Uses Honeywell Home's 868.0–868.6 MHz RF frequency band to communicate with compatible receivers, with an approximate residential wireless range of 30 metres.
6. Simple Battery-Powered Operation
Powered by 2 x AA batteries, this wireless thermostat does not require a wired power connection at the thermostat location. Batteries are required for operation.
Compatibility and Applications
The Honeywell Home DT4R White Spare Thermostat is intended for use with compatible Honeywell Home wireless control systems and suitable on/off appliances.
- Honeywell Home evohome systems with compatible receivers.
- Honeywell Home HCC100 Underfloor Multi-Zone Controller.
- Compatible legacy Honeywell Home RF systems.
- Suitable 24–230V on/off gas boilers and combi boilers.
- Compatible heat pumps with an appropriate on/off control input.
- Suitable zoning, underfloor heating, cooling and zone valve applications.
Important compatibility note: This thermostat is not suitable for directly controlling 240V electric heating circuits. Check the existing receiver, control system and appliance requirements before purchasing.
Technical Specifications
| Brand |
Honeywell Home by Resideo |
| Product Range |
DT4 |
| Model |
DT4R White Spare Thermostat |
| Manufacturer Part Number |
DTS42WRFST20 |
| EAN / GTIN |
5059085002671 |
| Product Type |
Spare wireless thermostat head |
| Colour |
White |
| Power Supply |
2 x AA batteries |
| Set Point Range |
5°C to 35°C |
| Display Range |
0°C to 40°C |
| Sensor Type |
10k NTC thermistor at 25°C |
| RF Frequency |
868.0–868.6 MHz |
| Wireless Range |
Approximately 30 metres (residential) |
| ErP Contribution |
Class V (+3%) |
| Dimensions (W x H x D) |
101 x 101 x 54 mm |
| Weight |
0.25 kg |
| Warranty |
2 years |
| Receiver Included |
No – thermostat head only |
Frequently Asked Questions
Does this Honeywell DT4R thermostat come with a receiver box?
No. The DTS42WRFST20 is a spare thermostat head only. A compatible Honeywell Home receiver or control system must already be installed.
Which systems is the DT4R White compatible with?
It is specified for compatible Honeywell Home evohome and HCC100 Underfloor Multi-Zone Controller receivers, as well as compatible legacy RF systems. Check the exact receiver model before ordering.
Can this thermostat control electric heating?
No. It is not suitable for direct control of 240V electric heating circuits. It is intended for compatible 24–230V on/off control applications.
How is the thermostat powered?
The thermostat operates using 2 x AA batteries. No mains power connection is specified for the thermostat head.
What is the wireless range?
The stated residential RF range is approximately 30 metres. Actual range can vary depending on building construction and signal conditions.
Order Honeywell Home DT4R Spare Thermostat from GetPlumb
Choose the Honeywell Home DT4R White Wireless Room Thermostat Spare DTS42WRFST20 for a compatible existing wireless heating control system. Check receiver compatibility and remember that this listing is for the thermostat head only.
Order Now from GetPlumb for your heating control requirements.
