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Vaillant ecoTEC plus 831 gc 47.044.32

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ed209

F .61 fault says poss gas valve control faulty amongst other things any advice on most common problem please
 
Check the harness for continuity and make sure all earthing is good on boiler
 
If it is ecotec 2 with air mass meter/stepermotor gas valve it will be a harness issue. If ecotec 1 2004-2012. it will be PCB issue. see the boiler sticky page 7 for the video.
 
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