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Viessman vitodens 100 on lpg

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alexmurchison

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Morning all. Boiler came up with F4 fault code. As per book could be one of half dozen issues!
Things I have checked..... Condense is clear... Burner gauze clean..... Ionisation block replaced....

from boiler reset, the fan starts, after a few seconds a distinct click and gas valve opens (confirmed 240v to live) simultaneously the distinct ticking of the electrode igniter...... This occurs for approx 5 seconds then power to both gas valve and igniter stop.... The fan continues till whole process starts again and F4 code shows.

Is this likely to be a pub issue or gas valve issue?? I have never worked on a Veisemann before so don't want to order costly parts.. Cheers
 
Are you gas safe reg ?
 
Hi Alex please send a pm to gas man with your gas safe details to gain access to the gas safe section of the forum. Cheers.
 
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