Worcester 9.24 Electronic D/H/W Problem?

Hi there the problem sounds like the dhw thermister is at fault, also the burner pressure is adjusted by a pot on the pcb so check this, i think its around 15mb on dhw full rate mode, the value of your thermister should be between 2k ohm and 18k, if its out of these values its knackered, its also possible its inacurate, only a ffew quid, and worth changing as a procaution, the other possibility is that the calorifier/dhw heat exchanger is full of muck, and not transfering the heat, giving the thermister a faulse reading, hope this helps

Steve
March 2009