My shower stopped working the other day, I didnt think too much of it, just assumed that the shower was broken. We moved in a couple of months ago and the shower looks pretty old anyway.

However, I noticed a strange smell in my kitchen, which happens to be where my shower isolator switch is located. I noticed the light on it was flickering and decided to turn it off.....it wouldn't budge. I turned off the electricity to the house and unscrewed the socket. I was able to flick it to off and the underside of the swith is half melted and black.

I'm no electrician but that doesn't seem great. Any ideas?