My questions is that my boiler fires up for about an hour and then shows a fault on the neon lights 30 & 40. This tells me that the high temp. stat. is faulty. I have changed the stat but the fault still keeps occurring ! This is on the central heating side radiators etc. I have changed the circulating pump & safety valve but I still have the same problem ?
Can anyone throw any light on this for me please ?
Can anyone throw any light on this for me please ?
