Vaillant Ecotec Plus 831 Ignition Electrode Replacement Electrode

This vaillant ecotec plus 831 ignition electrode helps create a reliable spark so your vaillant boiler can ignite and run smoothly. If the electrode is worn or damaged, you may get ignition lockouts, no flame, repeated firing attempts, or intermittent heating and hot water. Replacing it with the correct 0020133816 electrode is a direct fix to restore stable ignition and reduce nuisance shutdowns.

Compatibility :

• Ecotec Exclusive: 835, 843
• Ecotec Plus (system – VU): 612, 615, 618, 624, 630, 637
• Ecotec Plus (combi/storage – VUW/VUI): 824, 825, 831, 832, 835, 837, 838, 937, 938
• Ecotec Pro: 22, 24, 28, 30
• Exclusive: 627
• Ecotec VU GB: 656/4-5 A, 656/4-5 H

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQ’s)

1. What is Vaillant 0020133816?
It’s an ignition (spark) electrode used to light the burner on compatible Vaillant ecoTEC boilers.

2. What does the ignition electrode do?
It creates the spark that ignites the gas-air mix so the boiler can fire and run safely.

3. What are common signs of a faulty ignition electrode?
Ignition lockout, no spark, boiler tries to start then stops, no flame, intermittent hot water/heating, or repeated firing attempts.

4. Is this the same as a flame sensing electrode?
Not always. Some boilers use separate ignition and ionisation (flame sensing) electrodes; others may use a combined assembly. Always match the part number.

5. Do I need new gaskets or seals when replacing it?
Often it’s a direct swap, but if the burner door seal/gasket is disturbed during access, replace any seals recommended by the manufacturer.