hi, Just wondering if anyone could help. I have a Redring expression 500 electric shower. Its a coulple of years old. Recently, over the past few months,it has fused 30amp fuse twice. I have replaced it and just carried on using. The overheat light may come on for a few seconds sometimes when switched on. I have noticed that the temperature gauge is slowly having to be set to a warmer setting. Know nothing about electrics apart from replacing fuse. any suggestions or is this normal. Shower is never on more than 10 min at a time.