Loud noise

Postby twiggypuss » Sat Mar 20, 2010 1:55 pm

When my heating reaches the correct temperature and the thermostat turns it off, this is followed by a bang, it sounds like someone has thumped the side of the water tank with their fist. This only happens once or twice first thing in the morning, then it is ok for the rest of the day. Any ideas please?
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Joined: Sat Feb 21, 2009 1:44 pm


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