Worcester Bosch
Worcester Bosch Mechanical Timer MT10 87161066630
Worcester Bosch MT10 mechanical timer (87161066630) for 24-hour on/off control of Greenstar Combi boilers.
At a glance
- Part type: Clocks and timers
- Appliance family: Worcester Greenstar Combi
- Also known as 1015017
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£144.90
£120.75 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 MT10 is a mechanical timer used to switch a boiler on and off across a 24-hour period. It is a Worcester Bosch control accessory intended for the Greenstar Combi range, where it provides straightforward dial-based time control rather than digital programming. The unit sits in the boiler's control fascia and governs the heating and hot water operating periods according to the pins set on its dial.
Signs this part needs replacing
- The boiler runs continuously and ignores the set on/off periods.
- The timer dial does not advance, so switching times drift or stop altogether.
- Heating or hot water fails to come on at the programmed time.
- The dial feels stiff, slips, or will not hold the set position.
- Operation becomes intermittent, with the boiler switching at random times.
Before you order
- Check the GC number on the appliance data badge against the compatibility list to confirm the MT10 is the correct control for your model.
- Confirm the existing timer's part number matches 87161066630 or one of the alternative numbers listed.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Clocks & Timers |
|---|---|
| Appliance family | Worcester Greenstar Combi |
Compliance
| Manufacturer part number (MPN) | 87161066630 |
|---|---|
| GC number | 797-911 |
| Barcode / EAN | 4010009718406 |
| Commodity code | 9107 00 00 00 |
| GPC classification | Heating System Controls |
| Alternative numbers | WB87161066630, 1015017 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| 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 | — | — |
| WORCESTER GREENSTAR 25SI COMBI LPG | 47-311-88 | 47-311-88 | — | — |
| WORCESTER GREENSTAR 25SI COMBI NG | 47-311-84 | 47-311-84 | — | — |
| WORCESTER GREENSTAR 28I JUNIOR MK5 LPG | 47-406-57 | 47-406-57 | — | — |
| WORCESTER GREENSTAR 28I JUNIOR MK5 NG | 47-406-56 | 47-406-56 | — | — |
| WORCESTER GREENSTAR 28i JUNIOR LPG | 47-311-91 | 47-311-91 | — | — |
| WORCESTER GREENSTAR 28i JUNIOR NG | 47-311-87 | 47-311-87 | — | — |
Showing 10 of 16 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 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)
manualmanualWORCESTER appliance manual — GREENSTAR 25SI COMBI LPG (GC 47-311-88), GREENSTAR 25SI COMBI NG (GC 47-311-84), GREENSTAR 30 SI COMBI LPG (GC 47-311-89), GREENSTAR 30 SI COMBI NG (GC 47-311-85)
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