Hi,can anyone help. Have a baxi bermuda sl3 fire and back boiler. Had problems last year with hot water but no heating. Plumber called and fitted vavles each side of the pump and new pump. Got heating going but next day nothing again. He called back out and bled system but still nothing. "Been doing this for 44 years "he said, "Just dont know what else i can do" he said and left it at that. As a tradesman myself i have never walked away from a job but would be gratefull for any advice at all, thanks