Lockouts · Woolwich
Seized & Jammed Lock Opening in Woolwich
It is the coldest morning of the winter and the key goes halfway into the side door and stops.
In plain words
A jammed lock looks like one problem from outside and is usually one of three inside. The cylinder itself may have seized, packed with grit, corrosion or old grease. The link between cylinder and bolt, the tailpiece or cam, may have broken, which is why a key can spin without doing anything. Or the lock may be healthy and the bolt simply pinned against the strike by a door that has moved. Seized and jammed lock opening starts by telling those apart, because the right answer for one would damage the hardware in another. Once the culprit is known, the door is opened and the cause is repaired.
How the visit goesThe key turns a full circle without any resistance and the deadbolt stays exactly where it is. There is no click, nothing moves behind the face of the lock, and the door is as closed as it was before you touched it.
Seized & Jammed Lock Opening
How the visit goes
Levers, thumb-turns and mortise cases
Lever handles and mortise locks add parts that a plain deadbolt does not have, and each can jam on its own. A lever that drops without retracting the latch can have a tired return spring or a worn hub inside the case, though latch engagement, linkage, or the spindle can produce the same symptom. A thumb-turn that will not move can be a bent spindle, a stripped drive or a bolt pinned by the frame. On older houses and commercial doors the mortise case itself may be packed with decades of dust and dried grease. The locksmith works the lever, key and thumb-turn separately and feels where resistance starts, which locates the fault before the case is opened.
Thawing ice and clearing salt
Ice is melted, never chipped. A lock de-icer or gentle warmth on the cylinder face turns the frozen meltwater back to liquid so it can drain, and the key is then worked until the plug turns. Boiling water is kept well away, because it refreezes inside and can crack cold brass. Salt crust is flushed out with contact cleaner and the plug is dried thoroughly before any lubricant goes in, since salt and moisture sealed under lubricant keep corroding. The cylinder is then dressed with the lubricant specified for that product, applied once everything is dry. If the weatherstrip has frozen to the door, that bond is released and the seal wiped.
Set up for the freeze-thaw months
After a winter jam the cylinder has been dried and dressed with a lubricant that sheds moisture, and you know the routine for the next cold snap. A keyhole cover or a storm door keeps meltwater out of an exposed lock. A tube of de-icer in the car or coat pocket is the answer to a frosted cylinder, and boiling water is never the answer. Rinse salt spray off hardware near a treated driveway or walkway when the weather allows. Doors on the shaded side deserve a check after the first hard frost, because they hold ice long after the sunny side has cleared.
Seized & Jammed Lock Opening
In the van
Replacement tailpiece or cam
Penetrating lubricant
Lock de-icer
Plug follower and repinning kit
Electronic contact cleaner
Seized & Jammed Lock Opening
What affects the quote
Service or replace the cylinder
A cylinder that can be stripped, cleaned and rebuilt is quoted as labour with a few small parts; one corroded through is quoted with a replacement cylinder matched to your finish and keyway.
Matching finish and keyway
A replacement that has to match an unusual finish or a restricted keyway takes a specific part rather than a stock one, and the quote reflects the part.
The drive to you
Driving time is part of every call, and a property at the end of a long rural road is a different trip from one a few streets over.
What to have ready
- Do you have a spare or original key you could try?
- Is anyone inside, and can the door be opened from that side?
- Has there been a thaw and freeze, or a stretch of humid weather, this week?
Seized & Jammed Lock Opening: questions
QuestionsCan an old mortise lock in a century home be serviced rather than replaced?
Often, and keeping the original hardware is usually worth trying first, since it fits the door and suits the house, though condition and the availability of matching parts decide whether a repair is realistic. The case comes out of the door edge, the decades of dust and hardened grease are cleaned away, a broken spring or worn hub is replaced with a matching part, and the contact surfaces get fresh grease. If a bit key or a cylinder has worn, a new key is cut or the cylinder rebuilt.
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.
Why do locks jam more in winter?
Two reasons meet in the same season. Freeze-thaw weather sends meltwater into the keyway by day and freezes it by night, and cold thickens any old grease or oil that has been sprayed into the pins. At the same time dry, heated indoor air shrinks wood doors so bolts move in their pockets. Doors on the shaded or windward side get the worst of it. A dry lubricant, a keyhole cover and a check of the strike after the first hard frost take care of most of it.
