Lock hard to turn? Safe fixes to try
A stiff lock is often caused by dirt, a worn key, or a door that has moved out of line with the strike plate. Fixing it early can stop a key snapping.
Safety classification
Safe homeowner task
This guide covers safe first actions only. It is not a licence to perform regulated work or enter a dangerous area.
What to do
- 1
Check the door alignment
Try the lock with the door open. If it turns easily, the door or strike plate is out of line rather than the lock.
- 2
Clean the key
Wipe the key and check it is not bent or worn. Try a spare key if you have one.
- 3
Use a suitable lubricant
Use a dry graphite or lock-specific lubricant in the keyway. Avoid oils and general-purpose sprays that attract dust.
- 4
Work the key gently
Insert and remove the key a few times to spread the lubricant, without forcing it.
- 5
Book a locksmith if it persists
A locksmith can service the cylinder, adjust the strike or replace worn parts.
When to stop
- The key is bending or starting to twist
- The lock only works with force
- The door has dropped or will not latch
- The lock was damaged in a break-in attempt
Locksmith
Prepare the problem, safety status and location once. The matching category will be pre-filled.
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