After mixing highway and city driving my front left wheel gets so hot that you can smell it--not burning rubber, more like burning brake pad.

I took the car in to a Speedy Auto Service shop and they couldn't find anything wrong with that caliper. I can't notice the car pulling when I brake; and I can't notice the brake rubbing or slowing me down until i've been driving on the highway for a while. It's almost as though something other than the caliper is causing the wheel to heat, that heat causes the pads/rotor to expand which causes them to rub, which causes *large* overheating. What could be the initial cause of heating?

These are relatively new front brake pads and rotors (aftermarket), but are original Volvo calipers. I believe this problem just started--wasn't a problem when I first had the pads/rotors changed.

Anyone think it's a good idea to increase the gap between the brake pad and rotor by reducing the amount of brake fluid in the front brake lines? I'm not sure if they used shimms when they installed the new pads, but that could be another solution.

Any help/advice would be greatly appreciated.