Most Stiff Locks Are Dry Rather Than Dead
A lock that has become hard work feels finished. In a large share of cases it is not — it is dry, full of grit, or being asked to do a job that belongs to the door.
Locks are mechanical assemblies with fine tolerances, and they collect dust, old lubricant and debris for years without anybody opening them. A mechanism that has never been serviced is not worn out; it is neglected, and those are different conditions with entirely different answers. Our residential locksmith visits start with a diagnosis rather than a quote for that reason.
This page covers what is physically happening inside a stiff lock, the test you can run before anybody quotes you, what a repair involves on each mechanism type, and the three situations where a repair genuinely will not hold.
Lock gone stiff rather than dead?
That is the cheap moment. Call before it seizes entirely — a mechanism that still turns can usually be recovered, and one that has stopped usually cannot.
What Is Physically Happening Inside a Stiff Lock
Understanding this makes the repair-or-replace decision obvious rather than a matter of trust.
A pin tumbler cylinder works by lifting a row of small spring-loaded pins to exactly the right heights. The tolerances are fractions of a millimetre. Airborne dust, pocket lint carried in on the key, and the residue of whatever lubricant was last used all settle into the pin chambers and the springs.
As that builds up, the pins stop returning cleanly. The key needs more force, then a particular angle, then a wiggle. Nothing has worn out — the chambers are simply full. Stripping the cylinder, clearing it and relubricating correctly restores the original action, and it costs a fraction of a replacement.
Genuine wear looks different. The pin tips round off, the keyway mouth becomes belled, and the key sits deeper than it should. That is when a cylinder is finished, and it is a judgement made with the lock open on a bench rather than from the doorway — the distinction our locksmith for lock replacement page sets out in full.
The Thirty-Second Test
Before anybody quotes you anything, there is a check you can run yourself. It needs no tools and it separates two very differently priced jobs.
Open the door fully. Turn the key.
Free with the door open and stiff with it closed means the mechanism is healthy and the alignment is not. The door has dropped or the frame has moved, and the lock is the victim rather than the culprit. That is a keep adjustment needing no new parts at all.
Stiff in both positions means the mechanism itself needs attention. The distinction matters because a replacement fitted to a dropped door inherits exactly the same load and fails the same way, which is precisely why people conclude that locks are not made properly any more — and why our locksmith for lock change visits check alignment before quoting hardware.
Four Symptoms and What Each One Means
Almost every repair call is one of these, and each points somewhere different.
- A key that needs jiggling or a particular angle
- Debris or wear inside the cylinder. That is genuinely the lock, and it is usually repairable — stripped, cleared of grit and hardened lubricant, and reset with the correct lubricant.
- A handle that needs lifting harder than it used to
- A multi-point mechanism carrying the weight of a door that has dropped. The lock is a victim here rather than a culprit, and adjusting the keep addresses the cause.
- A latch that no longer meets its keep squarely
- The frame. Neither this nor the previous symptom is fixed by new hardware, because a replacement inherits exactly the same load and fails the same way.
- A key that turns fully and locks nothing
- The cam on the cylinder, or the follower it drives, has sheared. The door looks locked and is not, which can persist for days before anybody notices.
What a Repair Involves on Each Mechanism
The work differs by lock type, and so does how much there is to gain.
On a cylinder: dismantling, clearing the accumulated grit and hardened lubricant from the pin chambers, inspecting the pins and springs for genuine wear, and reassembling with the correct lubricant.
On a mortise or lever case: the same, with considerably more to go wrong and more to gain. These were designed to be serviced and most never have been, which is why they recover so well — a point our locksmith for lock repair in Randburg work depends on almost daily.
On alignment: adjusting the keep or strike so the bolts meet it squarely. No new parts at all, and it addresses the cause rather than the symptom. On outdoor hardware it is a different problem again — gates collect far more of everything, which our locksmith for gate locks page covers separately.
Not sure whether it is the lock or the door?
Run the thirty-second test and tell us the answer on the phone. It narrows the job before anybody is dispatched.
What People Call About
Six situations covering most repair work, and what each actually needs.
Key stiff for months
Dry and full of grit rather than worn out. The cheapest job on this page, and the window closes once it seizes entirely.
Door has to be pulled to lock
Alignment rather than mechanism. Adjusting the keep costs nothing in parts and stops the lock carrying a door that has moved.
Handle needs a firmer lift
The multi-point is carrying a dropped door. It warns for weeks and it is far cheaper before it stops throwing entirely.
Key turns but the door is not locked
A sheared cam or follower. The door looks secure and is not, which is worse than an obviously broken lock.
Somebody sprayed oil in it
Very common and it makes things worse. Usually still recoverable, but the sooner it is opened up the better the outcome.
Gate lock binding
If the gate has to be lifted before the lock engages, the gate is the fault. Correcting alignment lasts; new hardware there binds within months.
How a Repair Visit Runs
Five steps, and the first is a diagnosis rather than a price. That ordering is where the savings are.
- Step 1
The symptom is separated from the cause
Open and closed, both sides, with the door tested rather than only the key. That is what tells a mechanism problem from an alignment one.
- Step 2
The lock is opened up
Judged with the mechanism apart rather than from the doorway. Worn past recovery is a real call and it is made on evidence.
- Step 3
Options priced honestly
Service, adjust or replace, with a figure against each. Where the cheapest is correct, that is what gets recommended even though it earns us least.
- Step 4
The work is done on the visit
Cleared, reset and relubricated, or the keep adjusted, or new hardware fitted from van stock where a repair genuinely will not hold.
- Step 5
Tested before we leave
Operated from both sides, open and closed, until no force at all is needed. Every key handed to you and no record of it kept.
When a Repair Will Not Hold
Three situations, and taking a repair job in any of them would be doing you a disservice.
- The lock has been forced
- Gripped, drilled or levered, its internals are strained even where the key still turns. Servicing it returns a compromised component to duty on the door already chosen.
- The hardware is too weak for its door
- A light domestic cylinder on a door taking heavy daily use will keep failing however well it is maintained, because the fault is the specification rather than the condition.
- The mechanism is worn past recovery
- Rounded pin tips, a belled keyway, a key sitting deeper than it should. On hardware that has done thirty or forty years that is a fair call, made with the lock open.
- What is not on this list
- A stiff lock, a key that needs an angle, a door that has dropped, or a lock somebody has sprayed oil into. All four are usually recoverable.
How a Repair Visit Works
Operating commitments rather than claims, each visible during the job itself.
Where a repair genuinely will not hold, that is said plainly rather than attempted and charged for twice. The van carries the common cylinders so a replacement happens on the same visit.
Read the reviews on our Google Business ProfileFaults That Come and Go With the Weather
A category of fault gets reported as intermittent and dismissed as imaginary, and it is neither — it is a mechanism telling you precisely where it is in its life.
The classic version is a lock that is difficult first thing in the morning and fine by mid-afternoon. Overnight the metal contracts and the internal clearances tighten, moisture that condensed on cold hardware sits in the keyway, and any old lubricant is stiffer than it will be later in the day. By two in the afternoon everything has expanded slightly and the fault has disappeared.
The timber equivalent runs on a longer cycle. A door that sticks in February and not in August is taking up moisture through a wet summer and giving it back through a dry winter, which changes its dimensions by a millimetre or two — enough to stop a bolt meeting its keep squarely.
The reason both matter is that a fault which comes and goes never gets attended to. It is difficult on a Tuesday, fine whenever anybody thinks to look properly, and it stays on the list for two years while the underlying wear continues.
The honest reading is that a lock behaving differently at different temperatures has already lost most of its working clearance. Attended to at that stage it is a service; left longer it is a callout on a cold morning.
Lock Repair by Area
The same service, with the local conditions that change what actually turns up on the bench.
Locksmith for lock repair in Sandton
The warnings that run for weeks, and why the failure always lands when somebody is trying to leave.
locksmith for lock repair SandtonLocksmith for lock repair in Randburg
Older mortise cases, why force loses, and what sixty years of repainting does to a mechanism.
locksmith for lock repair RandburgLocksmith for lock repair in Midrand
Multi-point doors, dropped frames, and what fails first in high-turnover rental stock.
locksmith for lock repair MidrandLocksmith for lock repair in Centurion
Flat batteries, untested overrides and dropped doors — three faults reported as a broken lock.
locksmith for lock repair CenturionLocksmith for lock change
What is physically replaced, why cylinder length is a security question, and when replacement is right.
locksmith for lock changeLocksmith for home lockout
The urgent version, including what to check before calling and how a damage-free opening works.
locksmith for home lockoutGet it looked at before it stops
A stiff lock is a service. A seized one is usually a replacement. Call or WhatsApp while it is still the cheap version.
Repairing a Faulty Lock Before It Fails Completely
A good lock repair starts with separating a worn part from a lost cause. In many homes, a sticking lock, jammed lock, or stiff latch is caused by dirt build-up, misalignment, loose fixings, or a tired lock mechanism rather than total failure. In those cases, residential lock repair is often the sensible choice because it restores smooth operation without replacing hardware that still has life left in it. Door lock repair is especially worthwhile when the body of the lock is intact, the door is hanging correctly, and the fault is limited to one moving component or a minor internal defect. Repair vs replace comes down to condition and reliability. If the cylinder, latch, or internal springs are worn but serviceable, repair can be a practical and cost-conscious fix. If the mechanism is cracked, heavily corroded, or repeatedly failing after adjustment, replacement is usually the better answer.
A faulty lock that has been forced, badly damaged, or shows signs of internal breakage may also be beyond repair, even if it still turns partway. That judgment matters because a patch that only delays failure can leave you with the same problem again. Homeowners often contact Sandton Locksmith after noticing the lock needs extra pressure, the keyway feels rough, or the bolt does not line up cleanly with the strike plate. Those are the kinds of symptoms where a proper inspection can save time and money. For other situations, such as house lockout assistance or a car lockout, the right response is different, but this page is focused on repair decisions for residential hardware. If you want a practical assessment of whether your lock can be revived, 24 hour locksmith support through Sandton Locksmith can help you decide with confidence.