A stuck deadbolt is one of the most common lock problems in Australian homes. It usually happens because the door has shifted slightly out of alignment with the strike plate, the internal mechanism has worn or corroded, or the bolt has seized due to lack of lubrication. In many cases, a quick fix with lubricant and door realignment resolves the issue. If not, a locksmith can repair or replace the deadbolt quickly.
What to do right now
- 1
Try lubricating the deadbolt
Apply graphite powder or silicone spray directly into the keyhole and around the bolt where it enters the strike plate. Turn the key back and forth several times to work the lubricant in. Graphite is preferred over WD-40 for long-term lock health.
- 2
Check for door misalignment
Close the door and watch where the bolt meets the strike plate. If the bolt is hitting the edge of the plate rather than entering the hole cleanly, the door has shifted. Try pushing the door firmly against the frame while turning the key. For a longer-term fix, the strike plate may need repositioning.
- 3
Try operating from both sides
If the deadbolt has a thumbturn on the inside, try operating it from the inside. Sometimes the key side jams but the thumbturn side still works. If the thumbturn is also stuck, the internal mechanism is likely the problem.
- 4
Call a locksmith if DIY fixes do not work
If lubrication and alignment checks do not resolve the issue, the deadbolt's internal mechanism may be worn, corroded, or broken. A locksmith can disassemble the lock, diagnose the fault, and repair or replace the deadbolt on the spot.
When to call an emergency locksmith
- ⚠️The deadbolt is completely stuck and will not move in either direction
- ⚠️Lubrication has not resolved the sticking
- ⚠️The deadbolt is stuck in the extended (locked) position and you are locked inside or outside
- ⚠️The key turns but the bolt does not retract or extend
- ⚠️The thumbturn spins freely without moving the bolt
- ⚠️The deadbolt partially extends and then jams
How much does it cost?
A locksmith callout for a stuck deadbolt costs $80–$170 during business hours, including diagnosis and basic repair. If the deadbolt needs replacing, a standard residential deadbolt supply and fit costs $150–$300. A high-security deadbolt costs $200–$400 supply and fit. Strike plate realignment costs $50–$100. After-hours callouts add $50–$120 to the total.