In my kids '97 and my old '99 the e fan would come on when the ac was turned on... In my 2000 it doesn't come on? It will still work when idling and the temp creeps above 210...
Today it did cycle a few times with the ac on, and the temp gauge was only at like 180(just after initial start up)? What would be bad to cause this?
I tried swapping the relay from my wrecked '99 but it did nothing... Any ideas?

 

If the ac is on it has to run check connections. If the connections are good the fan maybe ready to go.