have you had the pcb replaced recently?
H5 refers to ABSENCE of pins[configuration] in pcb
i hope you still have the old pcb
its just a case of transferring pins from old pcb to new pcb
boiler WILL work then
manwithnoname
May 2011
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.