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just had a corgi guy around. he's looked at it and said it needs a new main gas governor .we had a new flow switch six months ago because the old one was leaking bad and he says it corroded the valve on the governor? so new boiler thanks for you advice jason

sorry didn't explain properly. He did a pressue check before isolating the boiler and noticed the pressure dropping as soon as he isolated the boiler the leak was gone. cheers jason

Hi all I've got a 20 year old vaillant boiler that up until last week was working great. A friendly man from transco turned up to fit a new meter. after installing it he needed to a pressure test and asked to see my boiler. after isolating it he redid his pressure test and informed me...