i have a potterton envoy40 and its been running fine and now wont light?
hi i have a potterton envoy 40 combi boiler its been working on constant for a week my partner turned it to twice aday and now it wont work at all just flashes 9 i would be great full if some one could help me and tell me what the nine is for and what could be wrong with it thank you kirsty
kirsty leatham, January 2006