Vaillant Wiring Harness, Boiler Wiring Loom, Replacement Cable Harness, Electrical Harness Assembly, Genuine Spare Part Part Number: 0020135154

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Vaillant Wiring Harness, Boiler Wiring Loom, Replacement Cable Harness, Electrical Harness Assembly, Genuine Spare Part

Name: Vaillant Wiring Harness, Boiler Wiring Loom, Replacement Cable Harness, Electrical Harness Assembly, Genuine Spare Part
Brand: BHL
SKU: W-419116
Price: 109.08 GBP
Availability: InStock

SKU W-419116

Manufacturer part number: 0020135154
EAN: 4024074617625

£109.08

inc VAT£90.90 ex VAT

Lead time: 1-5 working days

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Description

Product Overview

The Vaillant Wiring Harness is a genuine replacement wiring loom designed to restore safe, reliable electrical connections within compatible Vaillant heating appliances. Ideal for repairs and servicing, it helps ensure correct signal and power routing between key boiler components for dependable operation.

Key Features

Genuine Vaillant replacement part – helps maintain correct fit and reliable performance compared with non-genuine alternatives.
Purpose-built wiring loom – supports secure, organised connections to reduce the risk of loose or incorrect wiring during servicing.
Designed for boiler electrical systems – helps restore stable communication and power supply between internal components for consistent operation.
Ideal for maintenance and repairs – a practical solution when existing wiring is damaged, worn, or faulty, helping minimise downtime.

Use Case / Application

Suitable for use inside compatible Vaillant boilers and heating appliances where a replacement wiring harness or wiring loom is required. Commonly used during boiler servicing, fault-finding and component replacement tasks, for example when addressing intermittent electrical faults, damaged connectors, or worn cabling within the appliance casing.

Problem to Solution

Ideal for replacing a damaged or unreliable boiler wiring loom, helping restore safe electrical connections and dependable appliance operation.

Product Specifications

• Manufacturer – Vaillant
• Manufacturer Part Number (MPN) – 0020135154
• EAN / Barcode – 4024074617625
• Product Type – Wiring Harness

Why Buy from BHL

Vaillant is a trusted manufacturer of heating components, known for engineering quality and dependable performance in home heating systems. Choose this Vaillant Wiring Harness as a genuine replacement part to help keep your appliance working as intended. Buy online from BHL for competitive pricing and free and fast UK delivery* direct from our UK warehouses, delivered with care. BHL are a specialist online merchant, trusted by thousands of satisfied customers online since 1998 with thousands of 5 star reviews. *see our terms

Reviews

Buying guide: Boiler Spares

Boiler spares are replacement parts for gas, LPG and oil boilers: printed circuit boards, fans, gas valves, pumps, diverter valves, heat exchangers, sensors, pressure gauges, burners, electrodes, seals, casing panels and flue parts. Most are made for one manufacturer, and often for a narrow range of models, so identifying the boiler correctly matters more than anything else.

Identify the boiler first

Find the data badge, usually behind the front panel or under the controls cover. It shows the manufacturer, the model and the GC (Gas Council) number, a seven-digit reference for the exact appliance. Natural gas and LPG versions of the same boiler usually have different GC numbers, and parts can change between production runs, so the GC number and serial number are the safest way to match a part. The boiler's installation and servicing manual lists the parts for each model.

Part numbers and replacements

Search by the manufacturer's part number where you have it. Manufacturers sometimes replace a part with a newer version under a new number; only use a replacement that the manufacturer lists for your model. Some repairs need a kit rather than a single part, for example a part supplied with new seals or fixings.

Safety

By law, work on gas boilers and their gas parts must be carried out by a Gas Safe registered engineer qualified for that type of appliance; ask to see their ID card before work starts. Oil boilers should be worked on by a suitably qualified technician.

For thermostats and programmers, see heating controls.

Shop all Boiler Spares