by htg engineer »
Tue Jun 23, 2009 6:48 pm
It sounds like the diverter is at fault, if the water is only getting warm then the heat is going somewhere else - the radiators.
If the diverter is not switching across properly - the heat that should be transferred to the stored water is finding it's way to the radiators, you'll probably find the boiler will not cut out until the stored water reaches the set temperature - in this case it may take a while.
htg