I have an Ideal Isar HE24 which was in the house when we moved in, the Hot Water is not getting as hot as it used to, sometimes it is hotter than others. Yesterday I came home and the main trip switch had droped out, I traced it to the boiler and by putting things on one at a time (the hot water followed by one heating zone then the other) it seems to be working ok for now but am worried it will fail again. Last winter I had a similar problem with the switch triped, I could not get an engineer out for at least a week so I checked a few things myself, found the problem was a stuck diverter valve. Managed to release it and everything has worked well since until yesterday. Question do you think I have the same problem with valve partly open to give hot water problem?

Benkbonk, December 2010

check the h/water flow rate with measuring jug should be about 10-12 ltr per min depending on boiler the temperature of the h/water can vary if your turning the tap on too much you won't notice this in warm weather but in spells of extreme cold the flow rate at the tap can be critical the tripped switch may be a coincidence rule out the simple things first

brian, December 2010