your storage heater has 2 supplies,a 24 hr supply which is for the fan and a heating element,and an off peak supply for the storage heater. the charge the storage heater takes is automatic,the output dial is for the fan.there is a switch on the side of heater for the fan element which is used to suppliment the storage side and can be used or not.I suspect the heater has tripped out inside but only testing will locate problem
steve.e, October 2010