Potterton Netaheat 16-22 Mk II - pilot on but does not heat?
Potterton Netaheat 16-22 Mk II - pilot light comes on but main burner doesn't. Problem was intermittent first - now more often. Water sometimes now warms up - but heating doesn't. Any advice please. I am not a plumber, but is there anything I can do - or need to know before calling anyone else - many thanks.
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