they come on at 225/230deg, usually.
if they're coming on with the ac, I'd bet they work.
I've seen the temp get up to as much as 240-250 before they came on.
both my GAs used to run with the temp gauge straight up all the time.
always had me worried it was going to overheat or an intake gasket was bad
So I switched to the 185deg thermstat, and they run way under that mark.
~~ even under extreme "road rage" conditions
