Sime
Sime Main Heat Exchanger Body 6278911
Main heat exchanger body for Sime Murelle HE 12 and Murelle EV HE 12 gas boilers, part number 6278911.
At a glance
- Appliance family: Murelle HE 12
- Also known as 2042604
£372.97
£310.81 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 Sime 6278911 is a main heat exchanger body for Sime Murelle HE 12 gas boilers. It is the component that transfers heat from the combustion gases into the heating circuit water. It is supplied as the exchanger body only.
Signs this part needs replacing
- Water leaking from the exchanger body or its connections
- System pressure dropping repeatedly with no visible external leak
- Boiler overheating, kettling or banging during operation
- Repeated lockouts or ignition faults linked to poor heat transfer
- Discoloured system water or black oxide debris collecting in the exchanger
Before you order
- Confirm the appliance model and GC number from the boiler data badge
- Check that part number 6278911 matches the manufacturer's parts list for your appliance
- Identify whether your boiler is the MET variant, as both MET and non-MET models are listed
- Inspect the seals, gaskets and connections around the exchanger before fitting
Compliance
| Alternative numbers | 2042604 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME MURELLE EV HE 12 T - 8109161 | 41-283-19 | 41-283-19 | — | — |
| SIME MURELLE EV HE 12T MET - 8109150 | — | — | — | |
| SIME MURELLE HE 12 BFT MET - 8106350 | — | — | — | |
| SIME MURELLE SYSTEM HE12 - 8106360 | 41-283-05 | 41-283-05 | — | — |
| SIME SIME MURELLE HE 12 BFT MET | — | — | — | |
| SIME SIME MURELLE SYSTEM HE12 | — | — | — |
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.