Just read through all the posts on the this subject and reckon the problem might be the diaphragm but no-one has described how my boiler has deteriorated.
It started with my boiler only giving hot water when the central heating was switched on. The central heating is fine. At this time the water was coming out as hot as ever. over the last 4 or 5 weeks, it has become harder and harder to get any hot water and the temperature has been decreasing as the weeks went on. Getting any hot water involved switching all the hot taps on in the house and then switching them off on at a time. I now have no hot water at all.
I have removed the heat exchanger and descaled it. There wasn't much buildup anyway. I have removed the diverter and cleaned but have yet to touch the diaphragm as I haven't got a replacement with all the required seals. I have taken the flow switch off and pressed in manually. This fired the boiler up even when the boiler was switched to hot water only, but instead of hot water I got central heating.
So, diaphragm or something else. The fact that it has deteriorated over a period of weeks suggests something mechanical as opposed to switches or electronics, but I don't know how a diaphragm works so I can't be sure.
Any advise would be truly appreciated.
Andy
It started with my boiler only giving hot water when the central heating was switched on. The central heating is fine. At this time the water was coming out as hot as ever. over the last 4 or 5 weeks, it has become harder and harder to get any hot water and the temperature has been decreasing as the weeks went on. Getting any hot water involved switching all the hot taps on in the house and then switching them off on at a time. I now have no hot water at all.
I have removed the heat exchanger and descaled it. There wasn't much buildup anyway. I have removed the diverter and cleaned but have yet to touch the diaphragm as I haven't got a replacement with all the required seals. I have taken the flow switch off and pressed in manually. This fired the boiler up even when the boiler was switched to hot water only, but instead of hot water I got central heating.
So, diaphragm or something else. The fact that it has deteriorated over a period of weeks suggests something mechanical as opposed to switches or electronics, but I don't know how a diaphragm works so I can't be sure.
Any advise would be truly appreciated.
Andy