Thanks for the replies. Just to update, I installed a new controller and it now works like a dream!
Managed to get the money back on the pcb ;)
Thanks again.
Hi all,
Was hoping for some help regarding my boiler which has been working great until yesterday when it decided to turn on and stay on despite having the thermostat set to zero (and changing batteries). This means the ch is on permanently (and working fine) until I switch the boiler off...