How to Troubleshoot Combination Locks

Combination locks contain typically contain a series of three or four rings attached to a central shaft. The lock is controlled by turning the outside dial in a series of three numbers. This rotates and stops the discs at an opening or gate, making it possible to open the lock. If the lock refuses to open, the typical problem is a stuck lever or moving part. The parts may simply dirty, corroded, frozen or perhaps out of alignment.

Things You'll Need

• Rubber hammer
• Heat gun or hair dryer
• WD-40

Instructions

1. Strike the combination several times with a small rubber hammer. The force from the hammer may be sufficient to loosen the stuck lever.

2. Turn the dial to the first and second numbers as usual. Stop on the number eight on the third spin. Hit the lock several times with the rubber hammer. Repeat the process several times if the lock still does not open.

3. Heat a frozen lock with a heat gun or hair dryer. If the combination lock is used to secure an outdoor object the lock may freeze up in the wintertime. Heat the lock for several minutes. Attempt to open the lock as normal.

4. Lubricate the lock with WD-40 or a similar penetrating oil if it is old and corroded. Corrosion and rust can interfere with the moving parts in a combination lock. Spray the lock with a liberal amount of WD-40 or other lubricant. Allow the oil to penetrate the lock. Attempt to open the lock as usual.

5. Call the lock manufacturer if you have forgotten the combination lock numbers. The manufacturer will ask you for the serial number. This step works only if the original numbers have not been changed.

References

• E Notes: Combination Lock