Hi The pilot light on my Vaillant 221 VCW GB combi boiler keeps randomly going out. I have replaced the thermocouple and the overheat switch. but am still having the same problem.The boiler runs perfect except for this problem. Any suggestions would be most great full
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Read more: //www.diynot.com/forums/plumbing/vaillant-vcw-221-pilot-outage.316302/#ixzz1ozkUF3jt