My boiler was working fine untill i moved it from the kitchen to the loft to free up space. Now when you turn the heating on the pump kicks in, then the fan but no fire. so i thought it could be the pressure switch, so i took the cover off and blew down the pipe and the pilot lit but did not go to full flame. But when i put the cover back on it wouldnt light at all. Same with the hot water. Any ideas?
As the pilot is not lighting with the cover on, I would suspect a flue problem, as for only the pilot coming on when you operate the aps, possible a short pilot, but you need to check the flue first.
