Property :- Three year old apartment. The ceiling pull cord for my electric shower jammed yesterday in the off position. So I decided to replace it with a new one, when I exposed the switch from the housing I found that the negative wire was loose in its brass clamp and had been arking causing the plastic to heat up and warp, hence the jamming of the switch. Having replaced the switch and tried the shower, the red shower led comes and the shower runs, but the water remains cold ! any clues please. p,s the red neon on the pull switch is on all the time ( off or on ) have I wired it correctly ?