Garage door lock repair for latches that stick, jam or no longer line up

Do garage doors even have locks?

Many people aren't sure. If your door has an opener, there's a good chance you've never used a lock on it.

That's because a modern opener holds the door closed. When the trolley is engaged, the door can't be lifted from outside without considerable force. For day-to-day security on a powered door, that's usually adequate.

But plenty of doors do rely on a mechanical lock:

• Manually operated doors with no opener, common on detached garages and sheds
• Doors on storage units and outbuildings
• Homes where the owner wants a second layer when traveling
• Commercial doors locked at close of business
• Older doors that had a lock installed from new and still use it

And a lock that isn't used can still cause trouble. A slide bolt nudged across by accident, or a lock bar that's dropped into the track, will stop an opener dead — or bend the door when the opener tries to lift it.

The types of lock

T-handle lock

An exterior handle with a keyed cylinder, mounted in the center of the door. Turning it rotates a spindle that pulls two cables or rods, withdrawing spring-loaded latches from the tracks at each side.

Lock bars (side latches)

The spring latches at each edge of the door that engage slots in the vertical track. Operated by the T-handle or an inside release.

Inside slide lock

A simple bolt on the inside of the door that slides into a hole in the track. Operated from inside only. Takes a padlock.

Keyed cylinder with interior handle

A flush exterior cylinder connected to an inside handle and lock bars.

Center-mounted deadbolt

A floor or jamb bolt on some older and commercial doors.

Automatic opener deadbolt

An electric bolt, installed to certain openers, that slides into the track every time the door closes and withdraws before it opens.

Emergency release lock

A small keyed cylinder outside, connected by cable to the opener's release. For garages with no other entrance, it lets you disengage the opener from outside in a power outage.

Roll-up door latch

A slide latch on the curtain of a sheet door, engaging the guide and taking a padlock or cylinder.

Common lock faults

How we repair locks

1. Identify the lock type and the faultFrom outside and inside. Much of the mechanism is on the inner face of the door.
2. Free the door if it's stuckIf a jammed lock is holding the door shut, we release it without damaging the door.
3. Inspect the linkageHandle, spindle, cables or rods, latches, springs and the slots in the track.
4. Check alignmentWhether the latches meet the track where they should. If the door has dropped or the track has moved, that's corrected.
5. Repair or replaceCylinders, handles, cables, latch assemblies or the complete lock set, as needed.
6. LubricateA dry graphite or PTFE lubricant in the cylinder; light oil on pivots.
7. Rekey if requiredCylinders can often be rekeyed or replaced to suit a new key.
8. TestLocked and unlocked several times from both sides, and the door operated to confirm nothing binds.
9. Protect the openerWhere a manual lock and an opener coexist, we'll discuss disabling one or fitting an interlock.

Locks and openers together: a caution

This causes more damage than any lock failure.

If a door has both an opener and a manual lock, and the lock is engaged when someone presses the remote, the opener pulls on a door that's bolted to its track. Something gives. Usually the top section buckles at the opener bracket; sometimes the track tears or the opener's drive gear strips.

There are sensible ways to prevent it.

• Remove or disable the manual lock on a powered door if you never use it
• Use the opener's own lock feature. Many wall controls have a button that disables the remotes while you're away
• Unplug the opener when you engage a manual lock for a long absence, and leave yourself a note
• Fit an automatic deadbolt if your opener supports one. It locks and unlocks itself in step with the door

Improving garage security

Lock repair often leads to a wider conversation about security. A few measures are worth knowing.

• Rolling-code remotes. If your opener predates the mid-1990s, its fixed code can be copied. A new opener closes that gap.
• Erase lost remotes. If one has gone missing, wipe the opener's memory and reprogram the rest.
• Shield the emergency release. On some doors the release cord can be hooked from outside through the top of the door. A simple shield or a zip tie through the release lever's hole — one that still breaks with a firm pull — prevents it.
• Frosted or no glass. So nobody can see what's inside or whether the car is gone.
• Automatic close and alerts. A smart opener can shut a door left open and tell you about it.
• Lock the door into the house. Treat it like an exterior door, because it is one.
• Good lighting. Motion-activated lights at the garage discourage attention.

Lock replacement options

If the existing lock is beyond economical repair, there are choices.

A like-for-like T-handle set is inexpensive and restores what you had. An inside slide lock is the simplest secondary security for a manual door. For powered doors, an opener-integrated deadbolt is the most convenient. And for garages with no other entrance, an exterior emergency release lock is close to essential.

On commercial doors and sheet doors, heavier slide locks and cylinder latches are available, and can be keyed to match other locks on the site.

Locks in a Wisconsin winter

Exterior locks and our climate don't always get along.

Frozen cylinders. Moisture gets into the keyway and freezes. The key won't go in, or goes in and won't turn. A lock de-icer or a key warmed in your hand usually frees it. Don't force the key, and don't pour hot water on it — it refreezes worse. A dry lubricant applied in the fall helps keep water out.

Stiff mechanisms. Oil-based lubricants thicken in the cold and gum up the pins. We use graphite or PTFE in cylinders for that reason.

Corrosion. Road salt and damp air attack zinc and steel lock parts. T-handles on doors facing the street corrode first. Stainless or brass components last longer.

Frost heave and misalignment. When the slab or framing shifts with the frost, the door sits differently in its opening. Latches that lined up with their slots in September miss them in February. If your lock works in summer and not in winter, that's likely the reason, and the fix is adjustment, not a new lock.

Ice on the slide bolt. Condensation freezes interior slide locks in place.

Snow and outbuildings. Detached garages and sheds with manual locks are the ones people need to get into for the snowblower. A lock serviced before winter is one less thing to fight with at six in the morning.

Why call us for a lock

Replacing a T-handle is manageable for a handy homeowner. The difficulty is usually in the linkage and alignment behind it — and in getting a jammed door open without making things worse.

There's also the interaction with the opener and with the door's own hardware. Lock bars sit near the cables and bottom brackets, which are under spring tension. Drilling or unbolting in the wrong place is a risk.

We carry lock sets, cylinders, cables and latches for the common door types, and we'll check the door's alignment while we're there so the new lock keeps working.

Lock questions