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Hi All, Can I replace a sunvic sdv2211 with a honeywell V4073A or what would the honeywell equalivant be? Is it just a matter of draining down the bottom rads, rewiring the new one if the valve is in the upstairs cupboard, I will turn the boiler off and electric as well? Many thanks in...

:( Hello, I have a glowworm Complheat 55, central heating is fine, but when flicking the controls to just hot water the boiler does not fire up....only when flicking to heating or heating and hot water does the boiler fire, but still no hot water coming out of the taps???? Please help!!! The...