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I'm OK with electronics and general plumbing stuff. Is changing a early diverter valve somthing that I can do myself or does it have to be done by a corgi registered guy.
Hi
I have a Vaillant ThermoCompact(model is either 615E, 620E, 624E, 628E) . I think its about 4 years old. The pressure in the system is set to around 1.5bars.
I have 2 issues with this little blighter:
1. The CH works fine just by itself and the hot water works(more or less see...