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hello, i have a 2 year old boiler that works fine with CH but does not give me HW. It shows a S30 code and a tap icon below it. the manual overide on my switch (Siemens RWB9) does not work either. Do you think this could be the boiler or the switch perhaps? Ive opend a hot water tap but...

Hello everyone, I'm looking for some advice on my relativly new condensor system. I'm a novice DIY so apologies if i appear completely dumb! the plumber who completed the job has now emigrated so any advice would be really appreciated. I had the above fitted 12 months ago together with a...