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- 23 Sep 2016
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Hi, I just want to get some suggestions on this as it seems an odd problem. The boiler has had a few parts fitted by glow worm in the last couple of years including pcb, pump, and domestic hot water switch/kit. The problem we've been having since before summer is that when you turn on the hot water the boiler does not fire up unless you do a Fonzie and bang the boiler (not all that hard and it has to be on the metal above all the controls). We've put up with it over the summer but now its time to get it sorted as it won't come on with the timer for heating (unless banged). This is intermittent. The odd time it works fine but more often than not it won't start. Any ideas would be appreciated. Thanks