sprin04

I have an 04 legacy, the front pass, wheel that gets hot- about 300 after about 15 min of driving. (the driver side is not hot) Sometimes this happens sometimes it doesnt. I have replaced the pads, the caliper and brake lines. yesterday I also had the wheel bearing replaced. any ideas??? the mechanic is thinking the abs might be malfunctioning. (the car doesnt pull at all, no sounds no pulsing)