We had it on central heating only for a week or so manually switching to hot water just before anyone wanted a shower and then back to central heating.
Then after a week I turned it in and off a few times to double check it still did not work before an engineer visit and it was working fine...
Hi
My combi stopped feeding the central heating last week, and only fires for hot water supply when both heating and hot water are both set to ON.
BUT if I turn hot water function off, then the central heating will work.
So I can manually switch between hot water and heating but not have both...