Number 1 daughter had a problem with the ceiling light in her bathroom a few months ago. It wouldn't come on.
Had a look & the wiring was a right dog's breakfast. Remade all the connections using the wonderful WAGO connectors - worked a treat - until yesterday.
Now, when you pull the switch it comes on briefly, then goes off again.
Pull off/pull on - it does the same.
Apparently, if you leave the switch in the on position, it will randomly come on again later.
Remade all the connections yet again - now works fine - tested to the point of stupidity.
No loose wires it the switch, all seems fine.
It seems fine now, but if it happens again I'm at a loss.
Any clues as to what the fault was?