How to Repair Stuck Euro Cylinder Locks

What You'll Need
Philips head screwdriver
Channel grip pliers
Key for existing lock
Correct replacement lock cylinder with anti-jam feature
Keys for new lock

Sleek euro cylinder locks look unobtrusive and elegant on your front door. However, some models are notorious for jamming at the most inopportune times. Follow these tips to repair your stuck euro cylinder lock in an emergency where you are locked out of your home. Learn how to replace the cylinders at your first opportunity with a type that is much more resistant to jams.

Step 1: Remove the Door Handle

The euro cylinder lock is located partly inside the door handle and partly inside the frame. To access the support pins to free the lock, you will need to remove the door handle. Use the screwdriver to detach the screws holding the handle to the door. Remove the handle on the outside of the door first, as this will probably give you enough access to the lock to release it.

Step 2: Break the Locking Pins Holding the Cylinder in Place

You will see two support pins holding the protruding part of the euro cylinder lock in place. Grasp the euro cylinder housing with the channel grip pliers. Tighten the pliers to get the best grip, then bend the cylinder slightly up and down. When the two support pins break, the euro cylinder housing will pop out of the door.

Step 3: Remove the Old Euro Cylinders and Locking Bolt

Open the door and with the Philips head screwdriver, release the fixed screw that holds the lock into the door plate. Use the key to open the lock, and remove the existing cylinders. Set these aside, leaving the old key in them to prevent confusion with the new cylinders and key.

Step 4: Insert the New Anti-Jam Euro Cylinders

Measure the old cylinder housing to ensure you have the correct sized new lock. It should be about 5 mm longer on the outer side of the lock than the side that faces the inside of the door. Overall, it should be about 10 cm (4 inches) long. Place the new lock key into the new lock, and turn the anti-jamming device (black semicircle with a flange attached) so it is flush with the outer housing.

Insert the entire cylinder unit into the door. Turn the key so it activates the locking bolt. Check that the locking bolt moves in and out of the door smoothly. Remove the key and secure the new cylinder lock housing into the door with the fixed screw through the door plate.

Step 5: For Added Security, Replace the Door Handle

Consider replacing the door handle with a one-piece model that resists forcing for well over the 3 minute standard for safety, as tested by Underwriters Laboratories. Because the euro cylinder lock is situated below this type of door handle, being fitted into a separate steel frame, the lock cannot be tampered with or bypassed by removing the door handle.

An anti-jam lock, installed in a one-piece security door handle should prevent jamming and sticking of your euro cylinder door lock in the future.