Worcester Bosch
Worcester Bosch Diaphragm Switch 87085040490
Diaphragm switch for Worcester Bosch gas boilers, part number 87085040490.
At a glance
- Also known as 1012301
£319.16
£265.97 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 87085040490 is a diaphragm switch used in Worcester Bosch gas boilers. It forms part of the appliance's pressure-sensing circuit.
Signs this part needs replacing
- Boiler fails to ignite or repeatedly locks out
- Intermittent operation or nuisance lockouts
- Fan runs but the boiler does not fire
- Pressure-related fault codes appear on the display
Before you order
- Check the model number against the fit list above
- Confirm the part number on your existing component matches 87085040490
- If unsure, consult a qualified heating engineer
Compliance
| Barcode / EAN | 4010009949862 |
|---|---|
| Alternative numbers | 1012301 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER BOSCH W2751KV1B31S0595 | — | — | — | |
| WORCESTER BOSCH W3501KV1B31S0595 | — | — | — | |
| WORCESTER BOSCH W4001KV1B31S0595 | — | — | — |
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.