Honeywell
Honeywell Wireless Room Thermostat DT4R On/Off White DTS42WRFST20
Honeywell DT4R on/off wireless room thermostat in white, part DTS42WRFST20, supplied without a receiver.
At a glance
- Also known as 4200668
£90.48
£75.40 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Honeywell DT4R is a wireless on/off room thermostat finished in white. It belongs to the DT4R thermostat range and is used to control heating demand in domestic systems, switching the boiler or zone valve on and off as the measured room temperature moves above or below the set point. This listing covers the thermostat itself and is supplied without a receiver.
Signs this part needs replacing
- Room temperature consistently overshoots or undershoots the set point
- Heating remains on after the set temperature has been reached
- Boiler or zone valve fails to fire when the thermostat calls for heat
- Display blank, flickering or showing fault indications
- Intermittent operation or loss of communication with the receiver
Before you order
- Match the part number DTS42WRFST20 against the thermostat already fitted
- Cross-reference the alternative number 4200668 when checking records
- Check whether a receiver is already installed on the system, as this listing covers the thermostat only
- Confirm the system uses on/off control rather than a modulating arrangement
Mechanical
| Part type | Wireless room thermostat |
|---|---|
| Colour | White |
Compliance
| Manufacturer part number (MPN) | DTS42WRFST20 |
|---|---|
| Commodity code | 9032 10 00 90 |
| GPC classification | Thermostats |
| Alternative numbers | 4200668 |
No fitment data held for this part.
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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