In message , Phillip
Brown writes

How did you test the fan, Philip? Did you actually remove the fan to do
the
testing?

Simpler than that, I can't hear it. Normally it hums quite audibly. I'm
pretty sure it's the fan that hums anyway, and now no noise from it.

However tomorrow I will buy a neon screwdriver and test for 230v across the
fan coil.

Nooooooo!!!

Go and spend a tenner at Maplins and get a multimeter

A neon screwdriver will tell you that there's probably something with
volts on it somewhere within a 100m radius

--
geoff