Worcester Bosch
Worcester Bosch Room Thermostat Transmitter DT20RF Mk2 87161144630
Worcester Bosch DT20RF Mk2 wireless room thermostat transmitter, part 87161144630, for Greenstar i System boilers.
At a glance
- Part type: Thermostats, Thermistors & Sensors
- Appliance family: Greenstar i System
- Also known as 1021999
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£286.64
£238.87 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 Worcester Bosch DT20RF Mk2 room thermostat transmitter, part number 87161144630, is the room-sensing half of the DT20RF wireless control pair. It reads the air temperature in the room where it is mounted and transmits a heating demand to the receiver at the appliance. It is used across the Worcester Bosch Greenstar i System boiler family.
Signs this part needs replacing
- The boiler stops responding to changes made at the thermostat, so the room stays cold or overheats.
- Room temperature drifts well away from the set point before the appliance fires or shuts down.
- The transmitter display is blank, faint or flickering, or the unit fails to power up with fresh batteries.
- Heating runs continuously, or the appliance never receives a call for heat at all.
- The transmitter and receiver lose their link repeatedly, with the demand dropping in and out.
Before you order
- Check the GC number on the appliance data badge against the compatibility list, as the DT20RF Mk2 is used on a defined set of Greenstar i System models.
- Confirm the existing control is a DT20RF Mk2 transmitter before ordering; the alternative number 1021999 may appear on older documentation for the same item.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Thermostats, Thermistors & Sensors |
|---|---|
| Appliance family | Greenstar i System |
Compliance
| Manufacturer part number (MPN) | 87161144630 |
|---|---|
| GC number | H60-074 |
| Barcode / EAN | 4010009207894 |
| Commodity code | 9032 10 20 00 |
| GPC classification | Thermostats |
| Alternative numbers | 1021999 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 12i SYSTEM LPG | 41-311-69 | 41-311-69 | — | — |
| WORCESTER GREENSTAR 12i SYSTEM NG | 41-311-67 | 41-311-67 | — | — |
| WORCESTER GREENSTAR 15I SYSTEM LPG | 41-406-26 | 41-406-26 | — | — |
| WORCESTER GREENSTAR 15I SYSTEM NG | 41-311-84 | 41-311-84 | — | — |
| WORCESTER GREENSTAR 18I SYSTEM LPG | 41-311-87 | 41-311-87 | — | — |
| WORCESTER GREENSTAR 18I SYSTEM NG | 41-311-86 | 41-311-86 | — | — |
| WORCESTER GREENSTAR 24I JUNIOR MK5 LPG | 47-406-55 | 47-406-55 | — | — |
| WORCESTER GREENSTAR 24I JUNIOR MK5 NG | 47-406-54 | 47-406-54 | — | — |
| WORCESTER GREENSTAR 24I JUNIOR NG | 47-311-86 | 47-311-86 | — | — |
| WORCESTER GREENSTAR 24i JUNIOR LPG | 47-311-90 | 47-311-90 | — | — |
Showing 10 of 20 compatible appliances.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
WORCESTER appliance manual — GREENSTAR 12i SYSTEM LPG (GC 41-311-69), GREENSTAR 12i SYSTEM NG (GC 41-311-67), GREENSTAR 15I SYSTEM LPG (GC 41-406-26), GREENSTAR 15I SYSTEM NG (GC 41-311-84), GREENSTAR 18I SYSTEM LPG (GC 41-311-87), GREENSTAR 18I SYSTEM NG (GC 41-311-86), GREENSTAR 24i SYSTEM LPG (GC 41-311-70), GREENSTAR 24i SYSTEM NG (GC 41-311-68)
manualmanualWORCESTER appliance manual — GREENSTAR 24I JUNIOR MK5 LPG (GC 47-406-55), GREENSTAR 24I JUNIOR MK5 NG (GC 47-406-54), GREENSTAR 24I JUNIOR NG (GC 47-311-86), GREENSTAR 24i JUNIOR LPG (GC 47-311-90), GREENSTAR 28I JUNIOR MK5 LPG (GC 47-406-57), GREENSTAR 28I JUNIOR MK5 NG (GC 47-406-56), GREENSTAR 28i JUNIOR LPG (GC 47-311-91), GREENSTAR 28i JUNIOR NG (GC 47-311-87)
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