running hot water,no heating?worcester 24i junior boiler?

this could still be a diverter valve fault. I personally would go into the wiring centre and check the voltage to the boiler when the valve is activated, because sometimes even though the valve moves the microswitch doesnt activate. Thats what I would do but I would never recommend anyone else opens the wiring centre due to mains voltage being present. just said that to cover my backside lol

Brian Emian Plumbing & Heating
April 2011