The CH works ok but you get a bit of hot water only when the CH is on then it runs cold. Someone suggested this might be down to a faulty diverter valve. Your opinions would be appreciated.
Yup, it was the diaphragm. Got it working only for it to fail the next day. Not the diaphragm - there was something mounted on top of the pump that was leaking. She's got a BG contract on it now, thankfully.
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