Vaillant
Vaillant Heat Exchanger 103412
Heat exchanger, part 103412, for Vaillant EcoTEC PLUS 630 and VU 306/3-5 gas boilers.
At a glance
- Appliance family: EcoTEC PLUS 630 / VU 306-3-5
- Also known as 1375308
£805.67
£671.39 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 103412 is a heat exchanger used in Vaillant gas boilers. It transfers heat from the combustion gases into the heating and hot water circuit, and sits at the centre of the appliance's hydraulic and combustion path. It is listed for the EcoTEC PLUS 630 and VU 306/3-5 models.
Signs this part needs replacing
- Water weeping or staining around the heat exchanger body or its connections
- Boiler losing pressure repeatedly with no visible leak elsewhere on the system
- Kettling, banging or rumbling noises from the appliance during firing
- Visible corrosion, scale build-up or distortion on the heat exchanger surfaces
- Reduced heating or hot water output despite the burner firing correctly
Before you order
- Confirm the part number 103412 matches the number on the existing component or the manufacturer's parts list for your appliance
- Check the boiler model and GC number on the appliance data badge against the fitment list above
- Confirm whether your appliance is the VU 306/3-5 variant, as fitment is model-specific
- Inspect the surrounding seals, connections and pipework so any additional items needed for the job are identified before work starts
Compliance
| Barcode / EAN | 4024074479957 |
|---|---|
| Alternative numbers | 1375308 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VAILLANT ECOTEC PLUS 630 VU 306-3-5 | — | — | — | |
| VAILLANT VU 306/3-5 | 41-044-48 | 41-044-48 | — | — |
| VAILLANT ecoTEC PLUS 630 VU 306/3-5 (2005-2005) | 41-044-48 | 41-044-48 | — | — |
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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