Vaillant
Vaillant Wiring Harness 0020025036
Wiring harness for Vaillant ecoTEC PLUS and ecoTEC gas boilers, part number 0020025036.
At a glance
- Also known as 1379926
£37.73
£31.44 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 0020025036 is a wiring harness used on ecoTEC PLUS and ecoTEC gas boilers. It carries the electrical connections between components within the appliance, forming part of the boiler's internal wiring. It is supplied as a single harness assembly.
Signs this part needs replacing
- Insulation that is cracked, chafed or heat-damaged along the harness run
- Connectors that are burnt, corroded, loose or show signs of arcing
- Intermittent electrical faults or repeated error codes traced to the harness
- Boiler failing to fire or losing power to individual components intermittently
- Visible conductor damage or exposed wire at a plug or terminal
Before you order
- Confirm the appliance model and GC number against the boiler data plate
- Compare the connector layout, plug count and harness routing with the part removed
- Inspect the mating connectors on the boiler for damage before fitting a replacement harness
- Isolate the electrical supply and follow the manufacturer's wiring diagram when fitting
Compliance
| Barcode / EAN | 4024074508350 |
|---|---|
| Alternative numbers | 1379926 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VAILLANT ECOTEC PLUS 630 VU 306-3-5 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 630 VU 306-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 637 VU 376-3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 837 - VUW 376/3-5 R1 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 837 - VUW 376/3-5 R3 | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 937 VUI 376/3-5 | — | — | — | |
| VAILLANT VU 306/3-5 | 41-044-48 | 41-044-48 | — | — |
| VAILLANT VU 306/3-5 R1 | 41-044-48 | 41-044-48 | — | — |
| VAILLANT VU 376/3-5 R1 | 41-044-49 | 41-044-49 | — | — |
| VAILLANT VUI 376/3-5 | 47-044-39 | 47-044-39 | — | — |
Showing 10 of 22 compatible appliances.
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.
VAILLANT appliance manual — VU 306/3-5 (GC 41-044-48), VU 306/3-5 R1 (GC 41-044-48), VU 376/3-5 R1 (GC 41-044-49), VUW 376/3-5 (GC 47-044-33), VUW 376/3-5 R1 (GC 47-044-33), ecoTEC PLUS 630 VU 306/3-5 (2005-2005) (GC 41-044-48), ecoTEC PLUS 630 VU 306/3-5 R1 (2005-2006) (GC 41-044-48), ecoTEC PLUS 637 VU 376/3-5 R1 - 2006-2006 (GC 41-044-49), ecoTEC PLUS 837 VUW 376/3-5 (2005-2005) (GC 47-044-33), ecoTEC PLUS 837 VUW 376/3-5 R1 (2005-2006) (GC 47-044-33)
manualmanualVAILLANT appliance manual — VUI 376/3-5 (GC 47-044-39), ecoTEC 937 VUI 376/3-5 (2006-2012) (GC 47-044-39)
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