Vaillant
Vaillant ecoMAX 646 main heat exchanger 065150
Main heat exchanger for the Vaillant ecoMAX 646 and VU 466/4-5 / 466-7 boiler range.
At a glance
- Also known as 1375136
- Have the replacement fitted by a Gas Safe registered engineer
Showing prices
£959.58
£799.65 ex. VAT · VAT at 20%
Available to order · 1 working day
Available to order · 1 working day
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 065150 is the main heat exchanger fitted across Vaillant's ecoMAX 646 and related VU 466 boiler range. It transfers the heat produced by the burner into the central heating and hot water circuits.
Signs this part needs replacing
- Water leaking from the heat exchanger or condensate trap area
- Reduced or fluctuating hot water temperature
- Kettling or banging noises when the boiler is firing
- Lockouts linked to overheat or flow sensors
Before you order
- Confirm your exact model and production date against the fits list
- Match the part number printed on your existing heat exchanger
- Isolate gas, electricity and water before removal
- Have the replacement fitted by a Gas Safe registered engineer
Compliance
| Barcode / EAN | 4024074426159 |
|---|---|
| Alternative numbers | 1375136 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VU 466-7 | 41-044-58 | 41-044-58 | — | — |
| VAILLANT VU 466/4-5 | 41-044-58 | 41-044-58 | — | — |
| VAILLANT ecoMAX 646 VU 466-7 (2006-2006) | 41-044-58 | 41-044-58 | — | — |
| VAILLANT ecoTEC VU 466/4-5 (2007-2015) | 41-044-58 | 41-044-58 | — | — |
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.