Hi all
I have a Potterton Suprima 30 boiler that has stopped working over the last couple of days. The issue is intermittent and sometimes it functions correctly.
Some times, when heat/hot water is demanded, the boiler fails to start. When this happens, the fan does not start and I can hear a relay clicking on/off repeatedly. I can also hear the grundfos pump in the airing cupboard spinning up/stopping, this correlates with the clicking of the relay. I uploaded a video to show this (http://www.youtube.com/watch?v=SRakdvfmpFI). I have also taken the screw off the front of the pump and ensured that it is spinning freely.
Fearing PCB issues, I have popped the board out to inspect, and cannot see any dry joints under a magnifying glass. I have experience with microelectronics so am more than happy to resolder components if this is the issue, however at first inspection, the board looks OK.
The boiler has the Siemens LMU30.211B159 board, judging by the hand written label on the faceplate, i'd imagine this has been replaced at some point in the past.
Any ideas where to begin fault finding. More than happy to call in a Gas Safe engineer after the bank holiday weekend, unfortunately everyone I have called so far seems to say 'dump it mate, replace with a combi' and has no interest in fixing it. For the record, I have not, and will not open the combustion chamber side of the boiler.
I have a Potterton Suprima 30 boiler that has stopped working over the last couple of days. The issue is intermittent and sometimes it functions correctly.
Some times, when heat/hot water is demanded, the boiler fails to start. When this happens, the fan does not start and I can hear a relay clicking on/off repeatedly. I can also hear the grundfos pump in the airing cupboard spinning up/stopping, this correlates with the clicking of the relay. I uploaded a video to show this (http://www.youtube.com/watch?v=SRakdvfmpFI). I have also taken the screw off the front of the pump and ensured that it is spinning freely.
Fearing PCB issues, I have popped the board out to inspect, and cannot see any dry joints under a magnifying glass. I have experience with microelectronics so am more than happy to resolder components if this is the issue, however at first inspection, the board looks OK.
The boiler has the Siemens LMU30.211B159 board, judging by the hand written label on the faceplate, i'd imagine this has been replaced at some point in the past.
Any ideas where to begin fault finding. More than happy to call in a Gas Safe engineer after the bank holiday weekend, unfortunately everyone I have called so far seems to say 'dump it mate, replace with a combi' and has no interest in fixing it. For the record, I have not, and will not open the combustion chamber side of the boiler.