Have a problem with a boiler it is a bg 532i combi which I believe is a slightly modded Worcester bosch greenstar.
problem is with the heating side of the boiler it does not work. Unless you use the ch boost (chimney sweep) button. I have linking out the room stat and still no joy. Question is does the boost button go thought the same sequence of events and controls as a demand from the stat. Therefore does this verify that the diverter valve and the micro switch thermistor etc are all ok or does it bypass some?.
Many thanks
problem is with the heating side of the boiler it does not work. Unless you use the ch boost (chimney sweep) button. I have linking out the room stat and still no joy. Question is does the boost button go thought the same sequence of events and controls as a demand from the stat. Therefore does this verify that the diverter valve and the micro switch thermistor etc are all ok or does it bypass some?.
Many thanks