When hot water is demanded from taps/showers (Combination Boiler) it keeps going hot and cold. I have had the WB engineers out three times now and although they have changed many parts including exchangers, pump, diverter valve, and it works OK for a while it always reverts back to intermittent. The engineer says it's scale but I have put in de-scaler/cleaner into the system on two different occasions.
If its going to be a new boiler (hope not!!) how can I guarantee that it won't happen to the new one.
If its going to be a new boiler (hope not!!) how can I guarantee that it won't happen to the new one.