Ironically by cleaning and oiling them you can fix most locks in a matter of minutes.
How to make door lock smooth.
How to make mobile control door lock using arduino uno.
If the outside is a little high and the inside is a little low same with left right it will make the lock hard to turn.
Loosen the screws that hold the lock on and look down at the little tongue that runs between the cylinder thumbscrew.
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This occurs when dust dirt grime and other buildup accumulates on the internal.
You don t need a key to lock most doors from the inside.
First clean the keyhole with a penetrating lubricant like wd 40.
Fixing a few stubborn locks might involve disassembling cleaning and then reassembling the lock.
Turn the knob to make sure that the door is locked.
This video will show you how can control your door s lock by using mobile apk at home.
How to fix a sticky lock.
After enough use you might find that your door lock has begun to stick making it difficult to put in turn or pull out your key.
Other than that the lock has to be well straight.
This should lock the door.
If your knob has a push lock.
Part of list.