I have had an ongoing problem with my boiler that has seen visits from two different plumbers and now the second plumber has referred me to a third.
About a month or so ago I noticed that the pressure was rising when the heating was switched off. After visiting this forum I came to the conclusion that it was either the filling loop leaking or a hole in the heat exchange unit. I disconnected the mains water supply to the boiler and pressure stopped rising which didn't really help me identify the problem. I had my boiler serviced about 6 months ago and while he was servicing it he replaced the old steel filling loop with the key recharge system. I got the same plumber back and he re-pressurised the PRV and checked the filling recharge thing and said it was impossible for water to get into the system when the key was removed so it must be the heat exchange unit. My mother in law knows a plumber so she asked him to come over and have a look. He called me and said he had had a look at the recharge key thing and emptied and some water out and refilled it. Following that the pressure remained constant for over 24 hours so I assumed that the problem had been with the filling loop thing. The next day I noticed that the pressure began to rise again and it seems to be rising faster as the days go on. I called the plumber back and asked if he could replace the key charge loop thing with an new one in case it was faulty and he said he was uncomfortable doing this in case it did not work. Now I am at a loss. To add to the problems the PRV is stuck open now so I don't really have much of an idea of how much water is getting into the system. My question is :- What do I do now? Can the filling loop key thing let water into the system even when the key is removed? Am I doing damage to my system by continuously adding new water to the system? I really want to get this fixed and it is getting colder and colder and closer to Christmas. Also, if the problem was a hole in the heat exchange unit could the plumber have stopped the pressure from rising in any way when he came to look at it. Any help would be appreciated.
Thanks
About a month or so ago I noticed that the pressure was rising when the heating was switched off. After visiting this forum I came to the conclusion that it was either the filling loop leaking or a hole in the heat exchange unit. I disconnected the mains water supply to the boiler and pressure stopped rising which didn't really help me identify the problem. I had my boiler serviced about 6 months ago and while he was servicing it he replaced the old steel filling loop with the key recharge system. I got the same plumber back and he re-pressurised the PRV and checked the filling recharge thing and said it was impossible for water to get into the system when the key was removed so it must be the heat exchange unit. My mother in law knows a plumber so she asked him to come over and have a look. He called me and said he had had a look at the recharge key thing and emptied and some water out and refilled it. Following that the pressure remained constant for over 24 hours so I assumed that the problem had been with the filling loop thing. The next day I noticed that the pressure began to rise again and it seems to be rising faster as the days go on. I called the plumber back and asked if he could replace the key charge loop thing with an new one in case it was faulty and he said he was uncomfortable doing this in case it did not work. Now I am at a loss. To add to the problems the PRV is stuck open now so I don't really have much of an idea of how much water is getting into the system. My question is :- What do I do now? Can the filling loop key thing let water into the system even when the key is removed? Am I doing damage to my system by continuously adding new water to the system? I really want to get this fixed and it is getting colder and colder and closer to Christmas. Also, if the problem was a hole in the heat exchange unit could the plumber have stopped the pressure from rising in any way when he came to look at it. Any help would be appreciated.
Thanks