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Worcester Bosch Mechanical Timer MT10 87161066630

Worcester Bosch

Worcester Bosch Mechanical Timer MT10 87161066630

Worcester Bosch MT10 mechanical timer (87161066630) for 24-hour on/off control of Greenstar Combi boilers.

ConditionNew

At a glance

  • Part type: Clocks and timers
  • Appliance family: Worcester Greenstar Combi
  • Also known as WB87161066630, 1015017
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Hanicks code
87161066630
Manufacturer part no.
87161066630
GC number
797-911

The Hanicks code is specific to the selected condition. Manufacturer part no. and barcode are shared by every condition.

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£126.77

£105.64 ex. VAT · VAT at 20%

In stock
Delivery
In stock. Order by 4pm Mon–Fri, 10:30am Sat for same-day despatch. Standard delivery usually takes 2-3 working days (Royal Mail Tracked 48).
Hanicks code
87161066630
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

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.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.