Vaillant
Vaillant Heat Exchanger 0020233503
Heat exchanger, part 0020233503, for Vaillant EcoTEC Exclusive 835 VUW 356/5-7 combi boilers.
At a glance
- Appliance family: EcoTEC Exclusive
- Also known as 1388258
£848.38
£706.98 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 Vaillant 0020233503 is a heat exchanger used in Vaillant EcoTEC Exclusive condensing boilers. It transfers heat from the combustion gases into the heating and domestic hot water circuit. This component is fitted to the VUW 356/5-7 combi model.
Signs this part needs replacing
- Water leaking from the heat exchanger body or its seals
- Boiler overheating or locking out on a high-limit fault
- Reduced hot water output or poor heating performance
- Kettling, banging or gurgling noises from the appliance
- Discoloured or debris-contaminated water in the heating circuit
Before you order
- Confirm the boiler model against the appliance data badge
- Check the part number on the existing heat exchanger before ordering
- Inspect seals, washers and connections for condition
Compliance
| Alternative numbers | 1388258 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VUW 356/5-7 | 47-044-66 | 47-044-66 | — | — |
| VAILLANT ecoTEC EXCLUSIVE 835 VUW 356/5-7 (2016) | 47-044-66 | 47-044-66 | — | — |
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.
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