Hi,
I have a Vitopend 100 combi boiler. In the winter we have an issue where the hot water cuts off intermittently, for example during a shower, or at the kitchen sink. I have attached a link to a video which shows the front panel of the boiler as this occurs. The boiler is working fine, then it suddenly cuts out, tries to restart multiple times before it can get hot water going again, and the process repeats. I have had technicians replace almost everything in the boiler, including the electronics, the heat exchanger, flow sensors, and almost all temperature sensors. I am at a loss, and so are the technicians, from two different gas boiler maintenance companies, over several years. They keep proposing to replace another part, and I think the 3-way diverter is next on their list. But they haven't done electrical tests to determine which sensor/relay is tripping and preventing the boiler from maintaining heat on the hot water circuit.
This does not occur in the summer. Several days ago the heat exchanger was replaced, and that seemed to fix the problem, but it started up again yesterday. The technician now thinks that the new heat exchanger got plugged. But the old exchanger didn't seem particularly plugged to me when I ran water through it.
I have followed this forum over the years, hoping to find help. Perhaps the best is to ask you. If you need more info, some pictures, or more videos, please let me know. Anything to solve this problem.
Cheers
Video of problem (Google Drive)
I have a Vitopend 100 combi boiler. In the winter we have an issue where the hot water cuts off intermittently, for example during a shower, or at the kitchen sink. I have attached a link to a video which shows the front panel of the boiler as this occurs. The boiler is working fine, then it suddenly cuts out, tries to restart multiple times before it can get hot water going again, and the process repeats. I have had technicians replace almost everything in the boiler, including the electronics, the heat exchanger, flow sensors, and almost all temperature sensors. I am at a loss, and so are the technicians, from two different gas boiler maintenance companies, over several years. They keep proposing to replace another part, and I think the 3-way diverter is next on their list. But they haven't done electrical tests to determine which sensor/relay is tripping and preventing the boiler from maintaining heat on the hot water circuit.
This does not occur in the summer. Several days ago the heat exchanger was replaced, and that seemed to fix the problem, but it started up again yesterday. The technician now thinks that the new heat exchanger got plugged. But the old exchanger didn't seem particularly plugged to me when I ran water through it.
I have followed this forum over the years, hoping to find help. Perhaps the best is to ask you. If you need more info, some pictures, or more videos, please let me know. Anything to solve this problem.
Cheers
Video of problem (Google Drive)
