heating fine hot gets red hot then bioler cuts out water then luke warm boiler re fires does same boiler does not run constant while drawing off hot water heating system flushed out heat exchanger cleaned out can you help

alan, February 2009

THE MOST COMMON PROBLEM WITH THIS DESIGN IS THE DIVERTER VALVE DIAPHRAM. THIS GOES FAULTY EVERY 2-3 YEARS AS THE RUBBER IS UNDER CONSTANT STRESS. THE SECOND MOST COMMON FAULT IS THE PUMP WHICH YOU CAN OFTEN GET REWORKING BY HITTING IT WITH THE WOODEN HANDLE OF A HAMMER.

engdes, May 2009