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Hi, So the plumber came and unfortunately due to the temperamental nature of the problem, he couldn't replicate the issue. He did go away and consult the Worcester Bosch technical support line to see what he could find out. I wasn't charged for the call out. I spoke to him today and he...

Thank you for all the info. It really is much appreciated. I have a chap coming over tomorrow to look at it so at least I'm armed with some useful info to aid diagnosis. Thanks again, Andy

Hi, I've tried running the shower without a head on it but it still behaves in the same way. Someone mentioned a secondary heat exchanger being scaled up. It's a very hard water area here. Could that be plausible? Thanks, Andy

Now that's thrown me a bit. The hot tap when run in the bathroom stays hot. Knowing next to nothing about how boilers work, I logically expected the boiler to shut of regardless of what was drawing the hot water upstairs. Is the shower heated off something separately to the hot water in...

Hi, I have an (old) Worcester Bosch 230 combi boiler downstairs in the kitchen and a Mira one dial type mixer shower upstairs in the bathroom. Of late, after turning the shower on, the water heats up for a few minutes (the boiler fires up) and then the boiler shuts off and the water goes...