I too am having problems with a shower, in my instance it looses power occasionally whilst the shower is in operation. I have looked at the pull cord switch and can see no damage or poor connections. I am thinking of replacing the pull cord but out of interest i notice that previous responses to this thread suggest leaving the power supply on and switching direct at the shower unit. This makes sense to me but my wife always switches it off at the cord. Pulling the cord obviously increases the wear but is leaving the power supply to the shower on safe? Is anyone aware of any accidents because a shower was left on at the pull switch? I guess there is always are risk that if the shower leaked whilst power was connected it could cause a fire?