If a calliper is "hanging", it could be causing the brake pads to press against the rotor and overheat the brakes. You may want to see if the calliper is dragging.
spray pam on them
master cylinder is sticking
It's rare....because usually the master cylinder will allow pressure to bleed off. Not the other way around. But if you have replaced the calipers, this is the next thing I would check. I suppose it could be sticking.
seized calipers?
Have your brake system inspected. Sounds like you have a caliber sticking.
I advise you to perform a careful examination of your car's brake system.
If brakes are sticking and you drive for a long distance, then yes
your brakes are sticking need servicing asap
When brakes will not release when a foot is off the pedal, this is called sticking. There are various reasons for brakes sticking, but the most common involve an obstruction with the brake cable or the brake pads physically sticking to the drums or rotors. The safest way to remedy this problem is to have a professional inspect the vehicle.
have you tried the proportioning valve. sometimes dirt will get in there and clog the returns.
There is brake hardware and lubrication that needs to be replaced. The brake hardware and lubrication that goes on the hardware allows for the brakes to easily release. Now you may want to check to see if your calipers are sticking, or even check to see if the wheel cylinders for your rear brakes are frozen. I am a Brakes Plus Employee.