Sime
Sime Main Heat Exchanger Door 6278854
Main heat exchanger door for Sime Murelle HE 110 R and Planet DEWY 100 BFR boilers, part number 6278854.
At a glance
- Also known as 8922124
Showing prices
£70.57
£58.81 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 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
The Sime 6278854 is a main heat exchanger door for Sime gas boilers. It closes the main heat exchanger on the appliance and is listed by the manufacturer under part number 6278854.
Signs this part needs replacing
- Water or condensate weeping from the heat exchanger door joint
- Visible corrosion, pitting or staining on the door face
- Distortion or warping that stops the door seating flat
- A damaged or compressed sealing face that will not seal on reassembly
- Combustion staining or soot tracking around the door edge
Before you order
- Confirm your appliance model against the Fits list above
- Check that the part number on the component being replaced is 6278854
- Inspect the mating surface and any seal — the door will not seal correctly if these are damaged
Compliance
| Alternative numbers | 8922124 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME MURELLE HE 110 R - 8104960 | 41-283-28 | 41-283-28 | — | — |
| SIME MURELLE HE 110 R M - 8104990 | — | — | — | |
| SIME PLANET DEWY 100 BFR - 8104950 | 41-283-11 | 41-283-11 | — | — |
| SIME SIME PLANET DEWY 100 BFR | — | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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 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.