I noticed that my fan wasn't working while A/C was on.

I checked the fuse and it was blown.

Once I got home I put in a new fuse, started the car and turned on the A/C but the fan didn't come on.

At what point is the Aux fan supposed to come on?

I thought it was as soon as you turned on the A/C.

Does it have to get to a certain temp first?