HOW TO FIX JAMMED LOCKS

Depending on the cause, you can fix a jam with just a few minutes and common household items. The common problems of jammed and stuck locks and how to fix Them which are described below will help you: 

• Got jammed in lock body: Jamming in the lock body can occur due to oxidizing internal parts. You can use RP7 solution to spray and clean the rust. If a jam occurs due to the oxidation of the deadbolt or your lock has become stubborn, you should widen the slot on the inside of the strike plate, shave off a small amount of metal around the rim; make one or two passes and test the latch to see how it catches, widening the slot as need. 
• Got jammed in the cylinder: If the key won’t turn in the door lock, the problem could be dirt or dust in the cylinder, the oxidation of cam, springs or pins causing the pins to be stuck in a partially raised position. If that’s the case, you can spray dry lubricant RP7 or oil into the keyway and then insert the key a few times. This acts as a lubricant and may unjam lock tumblers that have become clogged with debris over time.  in the case that the door lock won’t turn at all despite turning the key,  there’s a strong possibility that there is a problem with the mechanism. Check to see if the lock cylinder is broken. The lock will need to be removed and examined, and that kind of job is best left to a professional locksmith. And you may need a new key core.
• Problem with door handles: There are 2 common problems with handles. First, Door Handle Not Springing Back because the spings is broken. In this case, you should replace the new spring.  Second, the lever does not rotate or squeaks, is heavy when it returns to the original position. This can happen due to rust. To fix it, you can use RP7 to make it smoother. Inability to rotate the handle can also occur due to misalignment of the spindle inside the lock body. At that time, you need to remove the lock to check and reinstall it correctly.