Sime
Sime Heat Exchanger 6174257
Heat exchanger for Sime Ecomfort Plus and Ecomfort System Plus gas boilers, part number 6174257.
At a glance
- Also known as 2042352
- If unsure, consult a Gas Safe registered engineer
Showing prices
£247.70
£206.42 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 6174257 is a heat exchanger for Sime gas boilers. It transfers heat from the combustion gases to the water circuit. This part is used in the Ecomfort Plus and Ecomfort System Plus range.
Signs this part needs replacing
- Water leaking from the heat exchanger
- Reduced heating or hot water performance
- Kettling or banging noises from the boiler
- Visible corrosion, scale or debris on the heat exchanger
- Boiler locking out or overheating
Before you order
- Confirm your boiler model and variant (e.g. with or without time clock)
- Check the part number 6174257 matches your existing component
- Verify compatibility with your appliance's GC number
- If unsure, consult a Gas Safe registered engineer
Compliance
| Alternative numbers | 2042352 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME ECOMFORT PLUS 25 HE-EV (WITHOUT TIME CLOCK) - 8104026 | 47-283-32 | 47-283-32 | — | — |
| SIME ECOMFORT PLUS 25 HE-EV - 8104022 | 47-283-30 | 47-283-30 | — | — |
| SIME ECOMFORT PLUS 30 HE-EV (WITHOUT TIME CLOCK) - 8104025 | 47-283-33 | 47-283-33 | — | — |
| SIME ECOMFORT PLUS 30 HE-EV - 8104021 | 47-283-31 | 47-283-31 | — | — |
| SIME ECOMFORT SYSTEM PLUS 25 HE-EV - 8104030 | 41-283-26 | 41-283-26 | — | — |
| SIME SIME ECOMFORT PLUS 25 HE-EV | — | — | — | |
| SIME SIME ECOMFORT PLUS 25 HE-EV (WITHOUT TIME CLOCK) | — | — | — | |
| SIME SIME ECOMFORT PLUS 30 HE-EV | — | — | — | |
| SIME SIME ECOMFORT PLUS 30 HE-EV (WITHOUT TIME CLOCK) | — | — | — | |
| SIME SIME ECOMFORT SYSTEM PLUS 25 HE-EV | — | — | — |
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.