If the malfunctioning lock is in the door handle there will be at least two screws securing the door handle to the door.
Old door lock stuck.
Another common cause is that the screws on the door knob are loose.
Locate the screws holding the lock in place on the inside of the door.
These are all problems you can repair yourself.
Remove the cover or faceplate of your mortise lock or surface mounted rim lock to repair it.
Remove the exterior door knob if necessary.
Place the end of the straw into the opening of the lock where you normally insert your key.
The fix in instances with a door latch stuck because it is jammed by rust and other materials it is always best to disassemble the lock and do a bit of cleaning.
3 if this does not help remove the knob.
Guide the straw as far in as you can to make sure you re hitting every part of the locking mechanism that might be sticking with the wd 40.
The most common is that the oil inside the door knob lock is old and has seized causing the lock to catch.
You can tighten a simple interior mortise lockset like the one shown at left as follows.
For some models you ll need to remove a few screws where the handle.
Find and remove the screws that attach the interior door knob to the door.
Pull the knob out from the door.
What happens when you can t open a door when the door latch is stuck.
Insert the straw into the opening of the lock.
Letting the components sit fully submerged in a vinegar of about 5 acidity will do the job of separating the gunk from your metal.
A simple solution i have used in the past comes in handy again.
This can cause a slight void inside the door knob lock which can also cause it to catch and get stuck.
2 hold the knob on the other side of the door and turn the loose knob clockwise until it fits snugly.
Deadbolt lock stuck in locked position if you have an older lock you might find that the bolt or internals have rusted into position or otherwise been gummed.
From fixing the alignment to lubricating the lock a little work gets your door back in order.
A jammed door lock can happen for many reasons including weather and alignment problems.
The key may be worn or damaged so it will not work in the cylinder.
Remove the old lock.
Soak your door lock in kerosene for 24 hours if it isn t attached to a door and has been rusted shut.
1 loosen the setscrew on the knob s shank.
The door latch is stuck i can t shut the door step 1.