I changed the divertor valve this morning to rectify the problem of intermittent no DHW , the CH was working fine( the valve was failing to operate the micro switches each time)I now have the problem of no DHW or CH. What happens is that on demand, Ch or DHW, the pump runs and then the fans starts, ignition takes place, boiler lights , green burner light comes on. This runs for about 5/6 seconds then shuts down. I need to reset the ignition lockout to get any responce again. I have checked the air pressure switch it seems ok The radiators dont require bleeding but could I have an air lock somewhere else e. g. heat exchanger
Anyone any ideas please
Anyone any ideas please