Guide
Woking Lock Guide: Why Your Key Will Not Turn, and What to Try Before You Force It
A key that refuses to enter, a key that enters but will not rotate, and a key that rotates but will not withdraw are three separate faults, and each has its own answer. Working out which one you have takes seconds, and it decides everything you do next.
On a uPVC or composite front door, the usual reason a key will not turn is not a fault: the multipoint mechanism is waiting for the handle. Whatever is going on with the euro cylinder, plug or keyway, force is the one thing that turns a free fix into a snapped key. This guide from Woking Locksmith walks through the checks in order, cheapest first. If you have tried them and the door still will not cooperate, call 01483 377197.
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Work Out Which of Three Things Is Happening
Describe it the way you would to a friend: it will not go in, it goes in but will not turn, or it turns but will not come out. Each points somewhere different. A key that will not enter usually means the wrong key, a blocked keyway or a bent blade. A key that enters but will not turn points at the key's cuts, the pins inside the plug, or the door itself. A key that turns but stays put almost always means the cylinder is not back at its resting position.
| What you are experiencing | What it usually is | Read next |
|---|---|---|
| The key will not go into the lock | Wrong key, an obstruction in the keyway, ice, or a bent key | The Key Will Not Go In |
| The key goes in but will not rotate | A worn key, a dry or worn lock, or a door pinching the bolt | The Key Goes In but Will Not Turn |
| The key turns but cannot be pulled out | The plug is not at its rest position, or the cylinder is worn | The Key Turns but Will Not Come Out |
If part of the key is still in the lock and the rest is in your hand, it has snapped rather than stuck, and that has its own guide: how to deal with a key that has snapped rather than stuck.
The Key Will Not Go In
Rule out the easy causes first: the wrong key, something lodged in the keyway, ice, or a key whose blade has bent. Take them in that order.
- Wrong key. It sounds too obvious to bother with, but in a house with several near-identical keys it happens often. Compare the key with its neighbours on the ring.
- Obstruction. Grit, a sliver of debris or the leftovers of an earlier problem can sit in the keyway. Shine a torch in; you can usually see it.
- Ice. Only in a hard frost, and it has its own section further down.
- Bent key. The one people overlook. A key carried loose in a bag or used to prise something open can bow just enough to catch on the keyway while still looking normal.
To tell a bent key from a blocked lock, lay the key flat along a ruler or the edge of a table and sight down it. Any gap or rock tells you the key is the problem. Look into the keyway as much as you like, but do not push anything into it; the reason is explained in the never-force section.
The Key Goes In but Will Not Turn
When the key enters but will not rotate, the cause is the key, the lock or the door, and it is worth testing them in that sequence because that is the order of cost. A worn key no longer lifts the pins to the correct height; this tends to creep up over weeks and is often worse with one copy than another. A lock that is dry, dirty or worn inside usually resists every key the same way. The door is the case that masquerades as a lock fault: the lock works, but the bolt is being squeezed by a door that has moved out of line with its keep. The giveaway is simple. If the key turns freely while the door is open and jams once it is closed, the lock is healthy and the door is not, and the full diagnosis for a door that will not lock once it is shut is in a separate guide. The spare-key test and the lubricant section below cover the other two.
The Key Turns but Will Not Come Out
A key can only be withdrawn at one point in its rotation, so if it will not come out, the plug has not returned to that point. The pins drop back and release the blade only when the plug is at rest, which on most cylinders means the key standing vertically. The answer is to turn it gently back towards upright rather than pulling harder, and to ease any weight off the door while you do it, because a door leaning on its bolt can hold the plug where it is.
There are two causes worth knowing:
- Not quite at rest. Fixed by turning, not tugging.
- A worn cylinder. The plug no longer springs back cleanly by itself. That is a repair, not a technique; the guide to the parts inside a uPVC lock and which one is which explains where the cylinder sits.
Pulling on a key that is not at rest is one of the two most common ways keys break.
On a uPVC Door, Lift the Handle First
On a uPVC or composite door fitted with a multipoint lock, the key will not turn until the handle has been raised as far as it will go. Many such doors use what parts suppliers call an overnight lock, which is built so that the handle must come up before the cylinder will rotate. If the handle only travels part of the way, that is a separate problem covered below.
Why the Key Cannot Turn Until the Handle Is Up
Raising the handle is what drives the hooks and rollers out from the door edge; the key merely holds them in place afterwards. The handle turns a spindle, the spindle turns the gearbox, and the gearbox moves every locking point together. Only then does the euro cylinder deadlock the whole assembly so the handle cannot be pushed back down. On these doors the key is the final step, never the first, and asking it to turn before the handle is up is asking it to do work it was not designed for.
What this tells you:
- Handle lifts fully and key then turns: nothing is wrong, it was the sequence.
- Handle will not lift fully: the key is not at fault, and lubricant will not help. See a handle that will not lift at all.
When It Is the Door Rather Than the Handle
Try the key with the door open: if it turns smoothly then but fights you with the door closed, the lock is fine and the door is sitting wrong. A door that has dropped on its hinges, swelled or shifted with the seasons pushes its bolts and hooks slightly out of line with the keeps on the frame, so they bind under load and the key has to work against that friction.
Two things cost nothing to try:
- Push or pull the door firmly towards the frame, or lift it slightly by the handle.
- Turn the key while that pressure is held off the bolt.
If that works, the lock has just diagnosed the fault for you: alignment. Treat it as a clue rather than a routine. A door that has to be wrestled every day will eventually take the key or the gearbox with it, and the adjustment detail is in the guide to a uPVC door that will not lock.
- Push the door fully closed.
- Raise the handle until it stops.
- Now turn the key.
Test the Spare Key
When the spare turns and your everyday key does not, the lock is fine and the everyday key has worn out. Read the result carefully:
- Spare works. The lock still accepts a correctly cut key, so your usual key has worn to the point where its cuts no longer raise the pins far enough.
- Spare fails the same way. The fault is in the lock, not the key.
Here is the part most people miss: a spare that works today has not solved anything for good. A worn lock wears keys down, and the key that has just failed has probably dragged the spare part of the way with it. Stop using a key you have identified as worn, because that is the one that snaps. You can check for wear by eye: the peaks of the cuts look rounded rather than crisp, and the blade looks thinner than a newer copy held alongside it. The guide to which lock and key types this applies to covers the common cylinders and keys.
If the Lock Has Frozen
During a hard frost a lock can ice up inside even when nothing on the outside looks frozen, and the key either will not enter or will not turn. The pattern is easy to spot: it happened overnight, the weather is bitter, and the same lock worked perfectly yesterday.
What Thaws a Lock Safely
Two things work: a lock de-icer, or warm air from a hairdryer.
- Lock de-icer. These are alcohol based, so they melt the ice without leaving water behind to freeze again. A small bottle is worth keeping in winter, stored somewhere other than inside the house you are locked out of.
- Hairdryer. On a warm setting, moved across the lock rather than pressed against it. Slower, but most people already have one.
Give either one time. The ice is inside the cylinder rather than on its face, so the warmth needs a minute or so to reach it; a short blast and an impatient turn defeats the purpose. Keep the flame of a lighter well away from the key and the lock, and resist the obvious kettle, for reasons that follow.
Why Boiling Water Makes It Worse
Hot water will melt the ice, and then it freezes again, with more ice than before. Water poured into a lock in freezing weather runs into the cylinder and stays there, so the next dip in temperature fills a space that was only partly frozen to begin with. It follows that the damage outlasts the cold snap:
- Refreezing. A lock that was partly iced becomes fully iced.
- Corrosion. Water sitting inside can rust the springs and pins, so one frosty morning turns into a cylinder that sticks all year. At that point it becomes a question of lock repair rather than replacement.
- Thermal shock. Boiling water over cold hardware and a glazed or painted door is a risk nobody needs before breakfast.
Lubricate It, With the Right Thing
Use a dry lubricant intended for locks, which means graphite or a PTFE (Teflon) based spray, and not a general-purpose oil. Oil-based products such as WD-40 hold on to dust, and over time oil and dust together can clog a keyway completely, so what frees a lock this month can seize it later. Cold weather adds a second reason: oil thickens as the temperature falls, which makes an oiled lock more likely to stiffen in a frost.
- Apply a small amount into the keyway rather than flooding it.
- Insert and withdraw the key several times, turning it each time, to spread the lubricant through.
- Wipe the key clean afterwards.
If the stiffness comes back within a few days, the lubricant was masking a symptom and something inside is worn.
Never Force It, and Here Is Exactly Why
A key that will not turn is close to snapping, and once it breaks a free fix becomes a paid one. Keys are made of thin brass or nickel silver, designed to carry a gentle turning force and nothing more, and a worn key is thinner again. Extra force of any kind, whether from a tool or simply a determined hand, gathers at the narrowest point of the blade, and that is where it gives.
People tend to force a key at three particular moments, and each already has a free answer above:
- A frozen lock on a cold morning: thaw it instead.
- A door binding in hot weather: take the pressure off the bolt.
- A key that turns halfway and stops: check the handle, then the spare.
Do not reach for anything that adds leverage. If nothing on this page has shifted it, the next step is a phone call rather than more effort.
Get the Lock Looked At
Tell us which of the three things your key is doing, whether the spare behaves the same, and what happens when the door is open, and the fault can often be identified on the call. It also helps to know whether the door is uPVC, composite or timber.
There is no call-out charge at any hour, emergency calls are answered around the clock every day of the year, and every job is priced on the call from what you describe, with any change explained before work begins. [PROVIDER PACK: DBS check and public liability insurance evidence]
Describe What the Key Is Doing: 01483 377197
Call or message Woking Locksmith. If you are shut out altogether, read about getting back in if you are shut out.
Key and Lock Questions
Is a key that will not turn always a sign the lock is failing?
No. On uPVC and composite doors the most common cause is the handle not being lifted first, and the next most common is a door slightly out of line with its frame. Neither is a lock fault. Try the handle sequence and the open-door test before assuming anything is broken.
Should I use WD-40 on a stiff lock?
It is best avoided. Oil-based sprays attract dust and can gum the keyway over time, and oil thickens in cold weather. A dry lubricant made for locks, graphite or a PTFE-based spray, is the better choice. If stiffness returns within days, something inside is worn.
Why does my key turn with the door open but not when it is shut?
Because the lock is working and the door is not sitting where it should. When the door closes, the bolts and hooks rub against the keeps on the frame and the key has to fight that friction. Easing pressure off the door helps in the moment, but alignment needs adjusting.
My spare key works fine. Can I keep using the old one?
Stop using it. A key that fails while the spare works is worn, and worn keys are the ones that snap. Bear in mind that a worn lock also wears keys, so the spare may not stay reliable for long.
Is it safe to pour hot water on a frozen lock?
No. It melts the ice briefly, then refreezes with more water inside the cylinder, and leftover water can rust the internal parts. A lock de-icer or a hairdryer on a warm setting does the job without those problems.
What should I do if my key snaps in the lock?
Leave the remaining piece alone rather than prodding at it, and avoid using the lock. The guide to removing a broken key explains the options, and if you cannot secure or open the door, a locksmith can help.