A sliding door that won't lock is a security problem, so it's worth fixing quickly. The good news: it's usually one of four things, and two of them are easy DIY fixes.
1. The door has dropped
Signs: you have to lift or push the door to get the lock to catch.
As rollers wear, the door sinks lower in the frame, and the latch no longer lines up with the keeper on the frame.
Fix: raise the door with the roller adjustment screws at the bottom corners of the panel. Our roller adjustment guide shows how. If the screws don't raise it, the rollers are worn out.
2. The keeper (strike) is out of position
Signs: the latch hook comes out but hits above or below the keeper.
Fix: loosen the screws on the keeper on the door frame, slide it up or down to line up with the latch, and tighten again.
3. The latch is worn or dirty
Signs: the lever feels gritty or loose, or the hook doesn't come out all the way.
Fix: clean it and add a little lubricant made for locks. If it's still loose, the latch mechanism is worn and needs replacing.
4. The lock mechanism is broken
Signs: the lever turns but nothing happens, or parts rattle inside.
Fix: the lock needs to be replaced. Most sliding door locks are replaceable without changing the door.
Extra security tip
Even with a working lock, a security bar or pin lock in the track adds an extra layer of protection.
Need it fixed today?
Lock and handle repairs start at $79, with a 6-month warranty. Call (689) 220-6966 for same-day service.
