We had a Sime Super 90 MK II installed about 4 years ago and have had it serviced regularly and basically trouble free. However, for a few months, we've have a situation where, when the heating is on, the boiler fires up OK but after a period - that can vary from 30 mins to 3-4 hours - the boiler will not fire, although the pump continues to run. By turning the boiler switch off and back on, the boiler will then fire again etc etc... One of the upstairs rads also seems prone to air, but this could just be a leak somewhere in the system and unconnected ...
Domestic hot water is fine, as long as the heating is switched off, or on and running OK.
The guy who installed the boiler has said it's probably an ignition board but doesn't appear keen to come and fix the problem - which I find a little puzzling. He's also advised that I contact 'Sime technical' as I could replace the board myself. But I ain't a heating engineer and not keen to start now..!! However, I need to get this sorted, but really don't want to get into the position where I end up replacing every PCB in the boiler to solve the problem.
Domestic hot water is fine, as long as the heating is switched off, or on and running OK.
The guy who installed the boiler has said it's probably an ignition board but doesn't appear keen to come and fix the problem - which I find a little puzzling. He's also advised that I contact 'Sime technical' as I could replace the board myself. But I ain't a heating engineer and not keen to start now..!! However, I need to get this sorted, but really don't want to get into the position where I end up replacing every PCB in the boiler to solve the problem.
