I do a few boiler repairs in CV areas and like eating in the Balti in Nuneaton and some in Far Gosford Street, the Dragon Chinese and very occasionally at the Thai Dusit.
Richy - would help if you said which vaillant the boiler is! COuld be 2 basic models, SIne T3 (wide "belt" around the middle) or a VCW 2XX - 2 square gauges on right.
Change the magneto, sensors that are in line with the thermocouple circuit. Pilot flame should be healthy and also ensure you are using a proper Vaillant thermocouple and not copy part.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local