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cheers mate, really appreciate your advice, i'll hopefully get it sorted over the weekend. :D

There has been a development, when turning on the hot tap with very little flow, the water becomes hot, however when putting it on normal flow the water goes back to being luke warm but the rads also start to get luke warm. Then when I attempted to trick the system by keeping the microswitch...

no, it just does not fire up at all on CH mode

I had issues with DHW last week so I replaced the split diaphragm yesterday in my lunch break. The boiler fired up lovely, ch & hw was fab. When I returned home from work, the boiler would not fire up for central heating, so on turning on the hot tap the boiler fired up but the water maintained...

After having DHW problems recently, I changed the DHW diaphragm and the DHW sensor, which seemed to solve the issue and everything appeared to be running tickedyboo. However in the last day or so, my partner complained the hot water only worked when the heating was on. After checking, the boiler...