Electric power shower

[John G]

My shower stopped working, As the light on the isolator switch wasn't coming on, I changed the switch. The new switch came on but was very dim? when i switched the shower on it never came on and the dim isolator switch went off anyone know whats going on?

 

[SparkyChick]

Without being there it's impossible to be certain, but based on what you've said I would be looking for a loose connection (or possibly more than one).

With loose connections, the voltage drop across the loose connection increases as the current draw goes up. This usually means lights get dimmer and any loose connections get warm, so it's entirely possible there is heat damage that will require attention (and it goes without saying that it's a potential fire risk).

But, this is based entirely on the very limited information you've provided and I could be wrong.

 

[timhoward]

I always take the front off shower isolators a 2nd time after I'm finished and re-tighten the terminals, invariably they can be tightened further.
All that to say - it's worth re-checking your work.

Shower isolators are probably the most difficult domestic accessory to install, especially if ceiling mounted and close to a wall.