The lock on a push button knob is meant strictly for household privacy.
Inner door wont lock.
Push button door knobs are used throughout the home as a cheap way to lock interior doors.
If not do the lipstick test smear lipstick on the latch and stick masking tape to the strike plate.
It s possible that there is an issue with the lock cylinder.
In some cars a failed door lock actuator may lock but won t unlock or the other way around.
Often they stick or break due to excessive pressure being placed on the door.
Loosen the knobs a little to relieve some of the pressure on the door and to free up the latch a little.
When a door latch won t catch it s because the latch doesn t align with the hole in the strike plate.
If the door still does not latch properly then it could be that the strike plate is not aligning properly with the latch.
Tap the end of a chisel under the door stop on the striker side of the jamb.
Step 3 align strike plate.
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In most cases the problem with a door lock actuator is limited to only one door.
Key is hard to turn or won t go in the lock don t force the key.
Put some graphite into the keyhole either by squeezing it from a tube or dusting it onto a key and then operate the lock a few times to work the graphite into the mechanism.
Slide the key in the lock and tap lightly on the key to lubricate the inside of the lock.
Shut the door and try to lock it.
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Faulty lock the internal mechanism could be broken.
Forcing it could break the key in the lock.
Try applying wd 40 or a silicone lubricant if the latch is still catching in the door.
In some vehicles the cable that connects the door lock actuator to the inner door handle may be built into the actuator assembly.
Spray the door key with a graphite based lubricant.
Flip the key and open the door.
Before you buy a replacement lock try some quick remedies.
Sometimes you can clearly see the misalignment.
Exterior locks can freeze interior locks get dirty and small internal parts eventually wear out or break.
Debris or ice from cold weather may be causing problems with the cylinder or you might simply be using the wrong key.
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