Vaillant Electrode Maintenance Kit - 0020143440

Vaillant Electrode Maintenance Kit - 0020143440

The Vaillant Electrode Maintenance Kit (Part No. 0020143440) is a high-performance genuine OEM service kit designed specifically for the higher-output commercial and large domestic models of the Vaillant ecoTEC range. This all-in-one kit includes the ignition electrodes, flame-sensing (ionisation) probes, and the necessary sealing gaskets. It is an essential component for annual maintenance, ensuring the boiler starts reliably and monitors the burner flame safely.

Key Features and Specifications
Complete Service Solution: Typically includes both the spark ignition electrode and the ionisation probe, along with specialized high-temperature gaskets.

Precision Ignition: Ensures a consistent, high-voltage spark to ignite the gas-air mixture smoothly, preventing "explosive" starts or ignition lockouts.

Safety Monitoring: The ionisation probe monitors the flame's presence; if the flame fails, the probe signals the PCB to shut off the gas valve instantly.

Genuine Vaillant Part: Manufactured to the exact metallurgical standards required to withstand the intense heat of high-output burners without warping or corroding.

Direct Fit: Designed specifically for the larger VU (System) models within the ecoTEC Plus series.

Boiler Compatibility
This maintenance kit is primarily used in high-capacity Vaillant ecoTEC Plus VU models, often found in large residential properties or light commercial settings. Compatible models include:

ecoTEC Plus VU 806/5-5: (R2, R3, and R4 versions).

ecoTEC Plus VU 1006/5-5: (R2, R3, and R4 versions).

ecoTEC Plus VU 1206/5-5: (R2, R3, and R4 versions).

ecoTEC Plus VU 486 & 656: Certain high-output system variants.

Important Safety Note: As this kit is part of the combustion process, it must be installed and tested by a Gas Safe Registered engineer. Worn electrodes can cause frequent F.28 or F.29 fault codes (Ignition/Flame Failure).

Maintenance and Installation Advice
During a full service of a high-output Vaillant boiler, electrodes should be checked for signs of carbon buildup, cracking in the ceramic insulation, or erosion of the metal tips. Replacing these parts as a kit ensures that the gap between the electrodes and the burner remains at the manufacturer's specified distance, which is critical for preventing unnecessary strain on the ignition transformer.

Essential Companion Products
To perform a complete service on these larger ecoTEC units, the following parts are frequently required:

Combustion Seal: Vaillant Burner Door Gasket - 0020038679

Ignition Lead: Vaillant Ignition Cable - 0020135119

Specialist Support and Local Collection
Are you seeing persistent ignition faults on a larger system boiler? Our trade counter team can assist your engineer in identifying if this maintenance kit is the correct solution for your specific model year and output.

Visit our trade counter and Bathroom Showroom at 61 Fullers Road, E18 2QB for expert technical advice and immediate access to genuine Vaillant spares.