I have an electric shower installed and wired up last year. There is a power cord in the bathroom which switched the power on and off. All has been well except it has been quite difficult to switch on/off using the power cord. A lot of strength has been needed. Now all of a sudden after using the shower the power wont turn off. I can pull the cord untill it clicks but the red light and a little pop down on/off indicator stays on. The pop down should be down and indicate its off and the red light should not be on. Ive looked at it and cant see any lose connections. Has the constant yanking to turn it on/off broke the actual internal mechanism of the white casing itself. Anybody any ideas please?