Sliding patio door locks can freeze or not work from time to time. Elements exposure and accumulation of dirt and debris can cause locks not working. Overuse can skew the lock and the bolt will not catch correctly. In some cases, the lock will not catch on due to dirt on the tracks of a sliding patio door. The construction keeps the door from closing properly and the lock will not catch.
Check the sliding patio door locks closed. If there is a sliding patio door, inspect the tracks for obstacles like dirt. Brush off dirt with a broom and clean the dislodged dirt with a dustpan or vacuum. Lubricating grooves with a lubricant to improve sliding operation and to shut the door tightly to the frame of the lock catch.
Locate the latch adjuster near the lock’s locking mechanism. Turn the lock screw clockwise with a screwdriver to lock protrudes further from the lock recess or counterclockwise to make barrier sink into the locking recess. Try to close the door for checking sliding patio door locks is ready or yet. To make sure that the lock has been ready for using. Make adjustments ratchet adjustment screw as necessary until the latch catches properly and lock the patio door.