We have a Gloworm Ultimate boiler (reasonably old). It works fine but with one problem. When the central heating is on it fires up and gets all the rads hot then the rads cool and if you turn the thermostat up it clicks as though it is about to fire up...but doesn't. THe only way to get it to fire up is if you run the hot tap for about five minutes...then, hey presto it starts. I replaced the wall thermosat but that has made no difference. I am sure there is someone who might have an idea what the problem is. Had a plumber round who said "could be one of many faults". Didn't want to pay out loads to find fault. Pretty sure it's simple, the clue seems to be in the running of the hot water allowing something to register in the boiler that it can start again. Safety overide???
Any ideas??
thanks
Any ideas??
thanks