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Thanks for the replies chaps! Further investigations reveal: The boiler is a 30HE & about 7 years old. The boiler engineer has "apparently" replaced the diaphragm in the diverter. On testing yesterday it took 8lpm at the kitchen tap before the boiler ignites. This seems pretty high? As...

Hi Boiler folk. I need advice. We have recently had a customer report a fault on a thermostatic shower connected to a roughly 10-15 year old Potterton combi. The shower has been working without problem for about 12 months. The fault is that the shower will run correctly for about 45 seconds...