glow worm compact, hot water but no central heating

[marios_kin]

i have a glowworm compact combi, and currently it senses a demand for hot water even though the taps are all off and no dripping.
I disconnected the plug for the diverter valve micro switch and the other sensor to the diverter valve and its still the same.
My question is really, would it be the pcb at fault or are there other things that could/should be checked b4 replacing the pcb?
thanks in anticipation.

 

[bengasman]

turn off cold supply to boiler, open and close hot tap, turn boiler off for a minute and then back on. see what happens

 

[Gasguru]

The hot water gland is probably leaking and siezed up. The microswitch may also be full of water. Its just below and to the left of the pump.

Change the diaphragm, cover, gland and the switch.

 

[marios_kin]

ty guys,
tried what you said Ben and it is exactly the same, stuck on constant demand h/w.
gonna have a look at the hot water gland later tomorrow gasguru ty for the quick response n thanks for your help both.

 

[marios_kin]

ty guys, the new gubbins you said sorted it