Looks like the problem has returned, even with four of the thermostatic radiator valves removed, the boiler has worked flawlessly all through summer heating up the hot water alone, but now as it is getting colder my central heating has come on and it has been tripping out on overtemp again. It runs OK for about 24 hours, heating the hot water & running the central heating, but the following morning when both the hot water & the central heating are both running together the boiler will trip out on overtemp. I then reset the boiler and it will run fine for another 24hours.
Any ideas anyone?
Any ideas anyone?
