Broken Lock
A sliding door that won't lock - or won't unlock - is both a security worry and a daily headache. The lock on a patio door is a simple mechanism, but a few specific parts fail with age and alignment, and most of them are straightforward to repair or replace.
Most sliding glass doors use a mortise lock: a latch or hook built into the edge of the door that swings out to catch a keeper on the frame when you turn the handle or flip the lever. Over years of use the small internal parts of that mortise lock wear or break, so the latch stops throwing, feels loose, or spins without engaging. The handle set itself - the interior lever and exterior pull - can also crack or work loose, so it no longer drives the lock.
Alignment is the other big cause, and it's often the real one. If the door has sagged on worn rollers or the frame has shifted, the latch no longer lines up with the keeper it's supposed to catch. You feel this as a lock that only works if you lift or push the door to just the right spot. In that case the fix isn't only the lock - it's getting the door sitting square again so the latch meets the keeper cleanly every time.
Because a patio door is a common entry point, a lock that doesn't work reliably is worth taking seriously, especially if you're leaving the house or turning in for the night with a door that only 'sort of' latches. Many homeowners have gotten into the habit of wedging a bar or dowel in the track because the lock quit - that's a sign the real mechanism needs repair, not a permanent solution.
We diagnose whether the problem is the mortise lock, the handle set, the keeper, or the door alignment, then repair or replace the failed part and, when needed, realign the door so it locks smoothly. We match the lock and handle hardware to your door, since sliding-door locks vary quite a bit between brands and ages, and we make sure the door both latches securely and releases easily when you want it to.
What we check on a broken lock
- The mortise lock body for worn or broken internal parts
- The handle set and lever for cracks or looseness
- The keeper on the frame that the latch hooks into
- Whether the latch and keeper line up, or the door has sagged
- Roller and alignment issues throwing off the lock engagement
- Correct replacement lock and handle hardware for your door
Related services
Frequently asked questions
Why won't my sliding door lock anymore?
It's usually a worn or broken mortise lock, a loose handle set, or - very often - a door that's sagged out of alignment so the latch no longer meets the keeper on the frame. We identify which it is; sometimes it's the lock itself and sometimes it's getting the door sitting square again so the latch catches.
Can you replace just the lock, or do I need a new handle too?
It depends on what's failed. Sometimes only the internal mortise lock needs replacing, and sometimes the handle set is cracked or worn and should be replaced with it. We check both and replace only what's needed, matched to your specific door.
My lock only works if I lift the door - why?
That's a classic sign the door has dropped on worn rollers or shifted in the frame, so the latch only lines up with the keeper when you lift it to the right spot. The lasting fix is to realign the door - and often replace the rollers - so it locks properly without the lifting trick.
Is a broken patio door lock a security risk?
Yes - the patio door is a common entry point, so a lock that doesn't latch reliably leaves your home vulnerable. Wedging a bar in the track is only a stopgap. We recommend having the lock repaired so the door secures properly on its own.
Need service today?
Call now for fast, friendly service across Orlando, FL.