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Worcester Bosch Protection Switch 16A 87445030240

Worcester Bosch

Worcester Bosch Protection Switch 16A 87445030240

16 A protection switch for Worcester Greenstore 6 combi and system boilers, manufacturer part number 87445030240.

At a glance

  • Also known as 1022777
Manufacturer part no.
87445030240
Showing prices

£318.78

£265.65 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

A protection switch supplied by Worcester Bosch as part number 87445030240, designated PKZM0-16A + B. It forms part of the electrical control and safety circuit on the listed Greenstore 6 appliances, providing switched overload protection on the 16 A supply. The switch is a serviceable component within the boiler's electrical assembly.

Signs this part needs replacing

  • The boiler has no power at start-up despite a sound electrical supply.
  • The protection switch trips repeatedly during normal operation.
  • The switch will not reset or latch in the on position.
  • Visible scorching, discolouration or a burning smell around the switch housing.
  • Loose or heat-damaged terminals at the switch connections.

Before you order

  • Confirm the appliance model against the fit list above.
  • Check that the existing switch is marked PKZM0-16A + B and rated 16 A.
  • Match the part number 87445030240 against the number on the failed unit.
  • Isolate the electrical supply and verify the terminal layout matches before fitting.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.