I have a Gainsborough 9.5E electric shower which has recently 'turned cold'. We can only get cold water (which is at a very high flow). I've tried the troubleshooting tips in the manual of very slowly turning the temperature dial into the warm section but this only results in a slight increase in temperature. The shower is still heating the water as when it is switched off the cold flow is removed and you get a few seconds of very warm water before it finally stops. It seems that if we could reduce the cold water flow there may be a chance of some warm water?

Lesley, November 2005

You could always try turning your main stop-cock (where water first enters your house) a few degrees in the closed direction. With a bit of fiddling and testing you should be able to get the flow where you want it, Though this will reduce the cold water flow everywhere in your house...

Joe, November 2005