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Person holding a cylindrical door-lock assembly beside an open green glazed door with its lower lock opening exposed. — Seized & Jammed Lock Opening, Silver Hills
Person holding a removed black lock assembly beside a partly open brown front door with a long black pull handle. — Home Lockout Service, Silver Hills

Lockouts · Silver Hills

Seized & Jammed Lock Opening in Silver Hills

The key turns a full circle without any resistance and the deadbolt stays exactly where it is.

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In plain words

This service has a season here. The first wet fortnight of winter sends meltwater into keyways that freezes overnight, and doors on the north and shaded sides of a building stay iced the longest. Salt spray from driveways and walkways leaves a crust that thickens with every thaw. Then summer humidity swells wood doors until the bolt drags in its pocket. A jammed lock opening in these conditions means thawing without boiling water, flushing out salt, drying the cylinder, and dressing it with a lubricant that sheds moisture, along with a check of the door so the same weather does not jam it again next month.

Sound familiar?

Every time you pull the key out of the side door it comes away gritty. The lock has been sticky since the salt trucks started running, and today it has gone from sticky to solid, with the bolt still thrown.

How the visit goes

Seized & Jammed Lock Opening

How the visit goes

Black door with a card-reader lock panel above a lever handle, beside a tray of tools and a parts box. — Silver Hills
Ceramic dish holding keys on a wooden table beside a leafy vase, with a black door, deadbolt and knob behind. — Silver Hills
  1. Strike plate, bolt pocket and seal

    The frame side gets as much attention as the door side. The locksmith looks at where the bolt meets the strike plate: scuff marks on the plate's edge, a bolt pocket shallower than the roughly twenty-five millimetres a deadbolt needs, paint or filler that has crept into the pocket, and weatherstripping thick enough to hold the door proud of the frame. A dab of chalk on the bolt end shows exactly where it lands. These findings explain a lock that works with the door open and jams when it is shut, and they point to a chisel, a screwdriver and a strike adjustment rather than to anything inside the cylinder.

  2. When corrosion has taken the core

    Occasionally the plug or shell has rusted or pitted past the point of cleaning, or an earlier forcing has twisted the plug in the shell. Then the cylinder is replaced rather than rebuilt. The locksmith matches the keyway and finish so the new part looks like the old one, and where the keyway allows, pins the new cylinder to the key already on your ring so nothing else in the house changes. If the whole lockset is tired, a replacement deadbolt or lever set goes on in the same visit, with the strike checked to suit it. The old parts are handed over so you can see exactly what failed.

  3. For a business: a door the staff can rely on

    On a commercial door the handover includes the people who use it. Whoever opens in the morning is shown how the lever, key and cylinder now behave, and the exit side is demonstrated so everyone knows the door opens from inside with one motion. If the mortise case was serviced, the parts that were replaced are named so a future locksmith knows what is in there. A note of which keys were tested and who holds them supports whatever key control the business runs. Spare keys are checked in the lock before they go back in the safe.

Seized & Jammed Lock Opening

In the van

  • Dry PTFE or graphite lock lubricant

  • Lock de-icer

  • Replacement cylinder

  • Long hinge screws

  • Key blanks and code cutter

Brass pull handle on a long rectangular plate with a keyhole, mounted on a black paneled door beside a white frame. — Silver Hills

Seized & Jammed Lock Opening

What affects the quote

  1. Door and hinge adjustment

    When the door caused the jam, hinge screws, shims, a strike move or a deepened bolt pocket are quoted as their own line beside the opening.

  2. Inside door or outside door

    A jammed bedroom or office privacy lock is generally a lighter job than a weather-exposed exterior deadbolt, and a mortise lock on an interior door sits between the two.

  3. How many locks are affected

    One seized side door is the simplest case; a front and back door that both drag, or a storefront with two leaves, adds hardware and time to the visit.

What to have ready

  • What kind of lock is it: deadbolt, knob, lever, mortise or keypad?
  • Was the door painted, re-hung or fitted with new weatherstripping recently?
  • Does the key go fully in and refuse to turn, or turn without moving the bolt?
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Seized & Jammed Lock Opening: questions

Questions
Could a jammed lock mean someone tampered with it?

Occasionally, but wear and weather are far more common. Signs that point to tampering are fresh scratches around the keyway, a plug that sits crooked, or debris such as glue or a broken tool tip inside, none of which appear from ordinary use. The locksmith looks for these during the inspection and says plainly what was found. If the cylinder has been damaged that way, it is replaced and, if you wish, the other doors are rekeyed.

Why did my lock seize when it worked yesterday?

Locks rarely fail in a day; they fail slowly over months and announce it in a morning. Grit and old lubricant build up in the pin stacks until one cold night thickens them past the point the key can overcome, or a door that has been drifting on its hinges finally pins the bolt after a humid week. The wiggle you needed last month was the warning. A lock in this state is usually cleaned or adjusted back to health rather than replaced.

What is a tailpiece, and why does it matter here?

The tailpiece is the flat bar that sticks out of the back of a deadbolt cylinder and turns the bolt mechanism when the key turns; on a knob or lever set the equivalent part is a cam or spindle. It carries all the twisting effort, so a bent, worn or broken one is the reason a key can turn without anything happening. It is a small part to replace, it comes in several lengths, and the right length matters.

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