This is probably a really dumb question, but I'm curious.

I have a 1990 F150 it has the original dash in it and on the A/C controls there is a setting next to A/C that is just the Ford oval.

What's the function of this setting? Is it some sort of Max A/C setting or is it just a dummy position.

Any knowlage is appreciated. Thanks!

 

It's max ac. Once upon a time a buddy and I had a pretty hard drunken laugh session that ford decided to put their emblem to represent an hvac selection.

 

Thank you.

 

Is that an aftermarket A/C? I used to have a 1990 F150 and I currently have a 1991 F150, both with factory air, and I do not have such a symbol on mine. My A/C choices are "Max" and "Normal".

 

I didn't get the truck brand new and I doubt it's aftermarket. I know they didn't really put all the same parts in these trucks even in the same year.