Vaillant
Vaillant Cable Tree (Harness) Control Ecomax Pro 256272
Vaillant 256272 cable tree control harness for Ecomax PRO 18E and 28E boilers, including VU 186-O and VU 286-O models.
At a glance
- Part type: cable tree (control harness)
- Also known as 1377638
£64.16
£53.47 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 256272 cable tree is the control wiring harness used on Ecomax PRO appliances. It carries the electrical connections between the boiler's control components, allowing the PCB to communicate with the fan, gas valve, sensors and other parts of the control circuit. It is a manufacturer part specific to the Ecomax PRO range.
Signs this part needs replacing
- Boiler fails to respond to controls or runs erratically with no obvious component fault
- Intermittent faults, lockouts or error codes that change or clear when the harness is moved
- Visible damage to the harness: chafed, brittle or heat-damaged insulation
- Corroded, loose or burnt connector pins at the harness plugs
- Continuity faults on one or more cores when the harness is tested
Before you order
- Confirm the appliance model and GC number against the fitment list above
- Inspect the existing harness and compare plug types and connector count before ordering
- Check the part number marked on the existing harness where legible
- Confirm no other fault, such as a failed PCB or sensor, is causing the symptoms
Compliance
| Barcode / EAN | 4024074432693 |
|---|---|
| Alternative numbers | 1377638 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VU 186-O | 41-044-30 | 41-044-30 | — | — |
| VAILLANT VU 286-O | 41-044-31 | 41-044-31 | — | — |
| VAILLANT ecoMAX PRO 18E VU 186-0 (2003-2006) | 41-044-30 | 41-044-30 | — | — |
| VAILLANT ecoMAX PRO 28E VU 286-0 (2003-2006) | 41-044-31 | 41-044-31 | — | — |
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.
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