Help For A Bad Lock
A Simple Troubleshooting Guide from Lostakey.net This guide organizes troubleshooting advice and lock maintenance tips into an easy-to-follow format for common lock problems.
Before You Start
Check for a Lock Cover-
Many RV, camper, and storage compartment locks have a small sliding cover over the key slot. Make sure the cover is fully open. Sometimes the cover sticks and prevents the key from going in correctly. Wiggle the cover gently and try inserting the key again.
Step 1: Verify You Have the Correct Key
Ask yourself:
Does the key fully insert into the lock?
Does it appear to fit properly?
Have you double-checked the key number?
Sometimes lock stampings are difficult to read. A lock marked as CH516 may actually be CH518 if the stamping is distorted.
Signs You May Have the Correct Key
✅ Key inserts completely.
✅ Key fits snugly.
❌ Key will not turn.
If these apply, the lock itself may be stuck rather than the key being wrong.
Step 2: Free Up Stuck Lock Wafers
Lock wafers can become stuck due to rain, dirt, corrosion, old lubricants, and salt exposure.
First Attempt-
Apply a lock-safe lubricant to the key.
Insert and remove the key several times.
Reapply and repeat.
Try gently turning the key.
Second Attempt- If there is little improvement:
Spray lubricant directly into the lock.
Allow it to soak.
Let it sit overnight if possible.
Continue working the key in and out.
Step 3: Use Gentle Tapping
Sometimes a wafer or spring inside the lock becomes stuck. Use a small hammer.
Tap lightly around the lock body and handle. Use sharp but gentle taps.
Some people have success tapping lightly on the inserted key as well.
Important Warning: Do NOT Force the Key
Excessive force can strip the outer wafer, cause the lock cylinder to spin freely, and permanently prevent unlocking. Use cleaning and lubrication techniques rather than brute force.
Why Locks Fail-
Corrosion: Brass wafers can corrode and develop green deposits.
Dirt Buildup: Dust and grime combine with moisture and old lubricant residues.
Stuck Springs: Tiny springs may become seized after years of exposure.
De-Icer Residue: Some lock de-icers may leave residue that contributes to brass deterioration.
Cleaning and Lubricant Products-
Common cleaning products mentioned include carburetor cleaner, brake cleaner, contact cleaner, PB Blaster, and Liquid Wrench. Common lubricants include gun oils, silicone lubricants, dry lubricants, Ballistol, and specialty lock lubricants.
About WD-40- Mixed opinions exist: some recommend it for cleaning and flushing locks, while others report it can leave residue that attracts dirt. WD-40 may help temporarily but may not be ideal for long-term use. Excess lubricant of any type can create problems.
Suggested Recovery Method
Tap the lock firmly.
Apply cleaner or penetrating product.
Tap again.
Apply contact cleaner.
Tap again.
Repeat if necessary.
Apply a suitable lubricant once the lock moves freely.
Help: Key Gets Stuck in the Lock
Hold the center of the lock cylinder with one hand.
Pull gently on the key with the other hand.
This may relieve pressure if the center section is moving or loose.