My fan has stopped coming on automatically. I have an overide switch wired in so it's not a problem at the moment, but can thermostatic switches fail?

And why? What is there to go wrong inside the block of brass?

I have a Ford switch in my rad that controls the fan (no relay).

Cheers

Mike

They are always going wrong, usually when you disturb them (I work in a bodyshop - always changing rads). We change VAG ones as a matter of course on any car over 5 years.

are your water levels okay? if you're running low on water you may get no flow past the stat, therefore no temperature for it to switch.

I had one fail, fitted new one and put in a failsafe switch on dash.

cheers

Dave

fit a relay --- fans take a lot of amps

Fan switches go all the time. Fit a new one and wire a relay in so theres less load on the switch..