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Hi. I posted earlier this year about this boiler and lack of hot water. The problem this time is that again, we have no hot water, but this time it appears to be because the top microswitch on the diverter valve assembly (S7) is not being switched on, or rather is very slow to operate when the...

Hi. This has a problem delivering hot water with heating off. It has a cam operated by a pushrod from the water valve. Observing the cam, it only moves about 2mm, not enough to make the dhw micro switch, and probably not enough to change the position of the servo valve. So the question is why...