Letterbox lock not turning
Most stiff letterbox locks come down to four causes. Try the safe checks first.
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Updated
Causes and fixes
| Cause | Try this | If it doesn’t work |
|---|---|---|
| Door has dropped | Lift the door slightly while turning | Cam adjustment |
| Dust or corrosion | Dry lock lubricant | Service or replace |
| Worn key | Try the spare key | Replace the lock |
| Code lock dials stiff | Rotate each dial fully a few times | Replace the lock |
FAQ
Should I use oil?
Use a dry lubricant made for locks, not cooking or general-purpose oil, which attracts dust and makes things worse over time.