boiler constantly calling for heat

[phil2804]

the make/model Vaillant VCW GB 242 EH

the problem
i had a standard timer switch fitted with the boiler controls ie. off timer 1 timer 2 and constant positions about 6 month ago i put the controls to the off position and the CH wouldn't shutdown so to shut it down i have to press the hotwater only switch on the boiler itself and then CH and hot water for the heating so to me it sounded like timer a stuck on the constant closing the circuit.
i've just replaced the the timer with a drayton digistat 3+rf and when installing and turning on for the first time the boiler had started the CH before i pressed the override on the receiver so the boiler constantly calling for heat unless i put it to hotwater only

any suggestions

 

[bengasman]

sounds like it is all wired up wrong

 

[phil2804]

all the wiring is correctly installed i took off the timer and the boiler still runs when CH button is pressed

 

[phil2804]

hi kev i see you have a manual for the boiler is there any chance you can send it to my email

[email protected]

 

[kevplumb]

i have but there is no fault finding in it

still want it ??

 

[phil2804]

yes please

 

[kevplumb]

sent

 

[phil2804]

thankyou

servo which one kev were is it located

 

[kevplumb]

take the two screws off either side of the grey cover and it is the white thing right in front of you

hang fire i will take a pic

View media item 8355
must remember to put the cover back on that boiler

 

[phil2804]

that part seems to be doing its job when i put the hot water on

 

[phil2804]

is it possible to be the pcb if so which one is it

 

[phil2804]

bump

 

[phil2804]

sorted it was the main pcb just changed it and all works fine