Sime
Sime Format 100 B gas/water heat exchanger 6174250
Genuine Sime gas/water heat exchanger, part number 6174250, for Format 100 B boilers.
At a glance
- Part type: Gas/water heat exchanger
- Also known as 2042350
- Have the work carried out by a Gas Safe registered engineer
Showing prices
£383.76
£319.80 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
This is Sime's gas/water heat exchanger, part number 6174250, fitted to the Format 100 B boiler. It transfers heat from the burner into the water circulating through the boiler's central heating and/or hot water circuits.
Signs this part needs replacing
- Boiler kettling or making unusual banging/rumbling noises
- Reduced heat output despite the burner firing normally
- Signs of corrosion, scale or leaking around the exchanger
- Boiler locking out on an overheat or flow fault
Before you order
- Confirm the part number printed on your existing heat exchanger matches 6174250
- Check your boiler's GC number against 47-283-08
- Isolate power, gas and water before removal
- Have the work carried out by a Gas Safe registered engineer
Compliance
| Alternative numbers | 2042350 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME CLIMIT GG M 28 BF MET - 8105461 | — | — | — | |
| SIME FORMAT 100B LPG - 8105403 | 47-283-08 | 47-283-08 | — | — |
| SIME FORMAT 100B NATURAL GAS - 8105402 | 47-283-08 | 47-283-08 | — | — |
| SIME METROPOLIS 30 BF MET - 8105412 | — | — | — | |
| SIME SIME FORMAT 100B LPG | — | — | — | |
| SIME SIME FORMAT 100B NG | — | — | — |
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.