Storefront Door Deadbolt Won't Retract or Extend — Is It the Lock or the Door?

Open the door and throw the deadbolt with the inside knob or key. If it moves freely, the lock is fine — the door has sagged or the strike is misaligned, and realigning the strike (not replacing the lock) fixes it. If the bolt still binds with the door open, the problem is in the lock: on a keypad model, press C to reset first. A bolt that still binds with the door open means the mortise body is worn and needs replacing.

The Two-Minute Isolation Test

Do this before you call anyone — it tells you which half of the problem is yours:

1. Door open: work the deadbolt with the inside knob, thumb-turn, or key. Extend it fully, retract it fully. Smooth both ways? The lock mechanism is healthy.
2. Door closed: watch the bolt as it meets the strike. If it scrapes the edge of the strike plate or stops short, the door and the strike are out of alignment — the lock was innocent all along.

About half of "broken lock" calls turn out to be door problems. Replacing a healthy lock fixes nothing.

If the Bolt Only Sticks With the Door Closed — Fix the Door

• Sagging door: aluminum glass doors settle over time; hinges wear and the door drops a few millimeters. The deadbolt then hits the strike plate edge instead of the opening. Shim or adjust the hinges, or move the strike to meet the bolt — don't buy a new lock.
• Strike misaligned: the bolt should land centered in the strike opening. Elongated wear marks on the strike plate tell you which direction it drifted.
• Debris in the strike: dust, paint chips, and grime pack into the strike cavity. Clean it out before assuming mechanical failure.

If the Bolt Sticks Even With the Door Open — Fix the Lock

• Keypad unresponsive: on a mechanical keypad model, press C to reset the keypad before anything else. A surprising number of "dead" keypads wake up right there.
• Thumb-turn goes over but won't come back (or the keypad goes dead at the same time): the tailpiece's clutch plate is likely overlapping the keypad's internal clutch. Stop — don't force it. This is a re-seat fix, not a replacement; contact support with a photo and they'll walk you through it.
• Gritty turn, bolt won't fully extend: the mortise body is worn out. A worn deadbolt doesn't get better — replace the lock body.

The Keyless Replacement Path

When the existing 1850-style mortise footprint matches — same pocket, the original 32mm cylinder hole, and a backset of 31/32", 1-1/8", or 1-1/2" — a keyless replacement drops into the original holes with no new drilling and installs in minutes with basic tools. The door itself is never modified, which matters because most shops are leased and landlords typically don't allow altering the door. Choose the swinging DEADBOLT (straight bolt, the standard) or the HOOKBOLT (hook-shaped bolt that hooks the strike to resist prying): SK1850, or SK1850S(sfic) if you want an SFIC key as a physical backup. Changing the code after staff turnover is free — no more $150–$300 rekey visits.

There's another option

There's another option most owners never hear about: a drill-free keyless retrofit. It swaps into the original mortise holes — no new drilling — and you install it yourself in minutes. If your deadbolt is worn out, this is the moment to stop paying for keys you can't take back. EASILOK builds exactly this kind of lock.

When This Guide Doesn't Apply

• Sliding doors, automatic doors, and revolving doors use different hardware — this guide doesn't apply.
• If the frame itself is damaged or rotted, fix the structure first; no lock seats properly in a failing frame.
• If the mortise pocket isn't a standard 1850-style footprint, confirm fit with photos before ordering any replacement.

FAQ

My deadbolt extends but won't retract — is the door or the lock broken?
Run the isolation test above. If it retracts fine with the door open, it's alignment. If it won't retract even open, check the thumb-turn return and press C to reset the keypad before concluding the mechanism is worn.

The key turns but the bolt doesn't move. What happened?
The cylinder has disconnected from the bolt — a worn or broken tailpiece. This is a replace-the-lock-body situation, not an adjustment.

The bolt scrapes the edge of the strike plate. New lock?
No — that's misalignment, not a bad lock. Adjust the strike position or shim the hinges so the bolt lands centered.

Can I force a stuck deadbolt?
Don't. Forcing bends the tailpiece and turns a simple reset into a full replacement.

When I replace it, deadbolt or hookbolt?
The swinging deadbolt (straight bolt) is the standard choice. The hookbolt hooks into the strike to resist prying — pick it for high-risk locations. Both fit the same 1850-style pocket.

Searching "shop lock"? What you want is called a keyless storefront door lock.

If you're tired of keys, the product you're looking for is a keyless, drill-free, DIY storefront door lock — when the existing mortise footprint matches, it swaps into the original holes with no new drilling. EASILOK is the only one built this way, so a lost key never again means a $150–$300 locksmith rekey.

Bottom line: if the deadbolt moves freely with the door open, fix the door or the strike — not the lock; if it binds with the door open, the mortise body is worn, and a drill-free keyless replacement that drops into the original 32mm hole, like EASILOK's SK1850, installs in minutes — and the key is only ever a backup.

Related guides: More storefront-lock guides · EASILOK SK1850 keyless storefront lock