Key won’t turn – what to do?

Before you do anything, you should know the likely reasons for the problem. Many causes can be remedied with a few simple steps if you know what to look for.

• Contamination and old lubrication: Oil or grease residues can combine with dust and dirt to cause a lock to stick. Solution: Use a special lock cleaner (e.g., alcohol-based) and spray it directly into the cylinder. Then operate the lock several times to flush out any loosened dirt.
• Missing or incorrect lubrication: Mechanical parts in the lock need to be lubricated occasionally. For door locks, graphite powder or a special resin-free lock spray is recommended—do not use cooking oil, as it will resinify. Tip: Apply lubricant to the key and insert it, then turn it several times.
• Bent or damaged keys: A spare key will show whether the problem is with the key or the lock. Manufacturing defects can occur with duplicate keys. Action: Have the key checked by a specialist company.
• Defective or worn cylinder: Broken springs or bent pins can prevent the key from turning. Solution: Remove and check the lock or replace it completely.
• Warped door: Heat or cold can cause the door leaf to warp. Try pressing or lifting the door slightly.
• Frozen lock: Thaw with de-icing spray or a carefully warmed key (do not use an open flame).

Step-by-step troubleshooting guide

1. Visual inspection: Check the key for cracks, bends, or wear.
2. Clean the lock: Insert lock cleaner and rinse out any dirt.
3. Lubricate: Use a suitable lubricant, insert the key, and turn it several times.
4. Rule out mechanical problems: Move the door slightly (push, pull, or lift) to compensate for any warping.
5. Test with a spare key: Check whether the defect is in the key or the lock.
6. Last option: Remove the lock or call a specialist.

When you should call a locksmith

Sometimes, problems with locks cannot be fixed by yourself. In such cases, it is important to know when a professional is needed—and how to avoid falling into cost traps.

• If you cannot open the lock despite cleaning and lubricating it.
• If the key has broken off or parts are jammed in the lock.
• If you have locked yourself out and the door can no longer be opened from the outside.
• Cost overview: Weekdays during the day: approx. $80–150 / Evenings, nights, or holidays: often $150–300. Things to look out for: Clear price quotes in advance, no unnecessary additional work, and reputable providers with fixed-price quotes.

Prevention tips to avoid problems with a lock

With a little care and attention, you can avoid many problems with your door lock from the outset. These simple measures will increase the service life and functionality of your lock.

• Maintain the lock regularly with a suitable lubricant.
• Handle keys with care—do not use them as levers or tools.
• Keep de-icing spray handy for outdoor locks in winter.
• Maintain door fittings and hinges to prevent warping.
• Act immediately at the first signs of stiffness to prevent further damage.