Caliper sticking - take off caliper and try to push back piston into the caliper bore (if possible with the bleeder open)
Flex hose restricted -Remove from caliper, take lid off of master cylinder and see if fluid runs out at a good pace (don't let it go empty)
Pads stuck in caliper hardware - remove caliper and make sure pads move freely. Calipers may act different from hot to cold, when does it not release? Check it when its acting up.
Any sudden brake loss can be the cause of 1. brake line damage 2. master cylinder disfunction
Could be low brake fluid. Emergency brake could be partly on-make sure it is pulled completely in the up position.
It's probably a worn suspension part.
Most common reason: rust and dirt.
Check your chair switch!
The e-brake may be off but the e-brake cable(s) may be frozen or need to be adjusted.
One of the brake calipers or drums is not completely releasing. If it's a disk brake, replace the calipers. If it's a drum, check the emergency brake cable.
The piston may be sticking for a variety of reasons. If you are inexperienced with brake problems, take it to a shop now.
Front emergency brake? Do you mean a frozen cable? If front brake is locked may be a frozen caliper Emergency brake tied to rear brakes only
Yes. I have seen many brake hoses cause a brake caliper or wheel cylinder to not be able to release. The inside lining of the hose cracks loose and acts like a check valve, it lets fluid in but not out.
Rome wanted to keep carthage from completely taking over sicily
check that the emergency brake pedal is completely up.If ok disconnect the electric cable from the emergency brake pedal. i think is brown in color if light turns off the problem is there.