Guide
Why Your Key Will Not Turn, and What to Do Before You Force It
Call with your postcode for a current arrival estimate.
- 24-hour emergency cover
- No call-out charge
- Price agreed before work starts
Working Out Which of Three Things Is Happening
A stuck key is really three problems wearing one name: the key will not go in, the key goes in but will not turn, or the key turns but will not come out. Decide which you have and the rest of this page gets much shorter. A refusal at the entrance points to the keyway, the blade or the weather. A refusal to rotate points to the key, the cylinder or the door. A refusal to come out points to the plug.
Key Turns but Will Not Come Out
This one often resolves fastest: ease the key back to its upright starting point, because the plug has to be at rest before the pins free the blade.
A Key That Will Not Go In
Rule out the wrong key, an obstruction, ice and a bent blade, roughly in that order.
The Key Goes In but Will Not Turn
On a uPVC door lift the handle fully before anything else. After that, compare keys, since a worn key and a worn or dirty cylinder feel identical from the outside.
| What it feels like | What it generally is | Section that helps |
|---|---|---|
| Turned once, now trapped | Plug not at rest, pins catching | The key turns but will not come out |
| Will not enter | Obstruction, ice, bent or wrong key | The key will not go in |
| Enters, will not rotate | Handle not lifted, worn key or cylinder | Lift the handle first |
If part of the key is still in your hand, it has snapped rather than stuck, and the broken key guide explains what comes next.
On a uPVC Door, the Handle Must Be Lifted First
Here is the one sentence most worth reading on this page: on a uPVC or composite door with a multipoint lock, the key will not turn until the handle has been lifted all the way. Close the door first, lift the handle until it stops, then turn the key, and in that order the key usually moves easily. A handle that only goes up part way is a different matter, and the next heading deals with it.
Why Until the Handle Is Up the Key Cannot Turn
The handle sits on a square spindle that runs into a gearbox in the edge of the door. Lifting it drives the gearbox, which slides the locking points out along the whole height of the door. While the handle is down, the gearbox stops the cam on the back of the euro cylinder from rotating, so the key cannot turn however hard it is pushed, and it should not be pushed.
The Door Rather Than the Handle: When It Is
Open the door and lift the handle again. If it now travels all the way, the door is out of alignment with the frame and the mechanism is not the culprit. If it still jams, the gearbox may be the issue, which the uPVC mechanism problems guide explains.
Close the door. Lift the handle fully. Turn the key.
If the Lock Has Frozen
In a hard frost, ice can form inside a lock with nothing to show for it outside, and the key will not go in or will not turn. If it went wrong overnight, if it is cold, and if the same lock was fine yesterday, you are almost certainly looking at a frozen keyway rather than a fault.
What Thaws a Lock Safely
A purpose-made lock de-icer is the answer: a short burst into the keyway, a pause, then a gentle try. Keeping the key warm in a closed hand between attempts gives it a little extra help. What you must not do is heat the key in a flame, which damages both the metal and any plastic around the bow. Nor should you push or twist hard; a frozen lock is exactly where keys break off.
Boiling Water Makes It Worse: Why
It looks sensible, which is the problem. The water thaws the lock for a few seconds, seeps inside, and freezes again as it cools, leaving the lock more solidly iced than before. Once you are in, a dry lubricant in the keyway is what helps keep moisture from settling there again.
Testing the Spare Key
A spare key tells you something no other check can: when it turns and the key you use every day does not, the lock is working and the everyday key has worn out. Try it before you reach for anything else.
- The spare works. The pins and plug still respond to a key with correctly cut edges, so the problem is your daily key, whose cuts have worn too low to lift the pins properly.
- The spare fails too. Two keys failing the same way puts the fault inside the lock.
Here is the part people misread. The spare working today is not the problem solved. Locks and keys wear together, so a cylinder that has worn one key out has usually been working on the other. Stop using the worn key altogether; carrying on is how a blade ends up snapped in the plug. To check, hold the two side by side: worn cuts have soft, rounded peaks instead of crisp points, and the blade is visibly slimmer. More on which lock and key types this applies to.
Exactly Why You Should Never Force It
Do not force it: a key that refuses to turn is close to snapping, and a snapped key turns a free fix into a paid one. Plenty of snapped keys started as stuck keys that someone decided to win against.
Keys are not built for strength. The blade is thin brass or nickel silver, intended to pass a light rotating force to the plug. Wear makes it thinner. Force applied through a tool, through both hands, or through sheer determination ends up concentrated at the narrowest section of the blade, and that is the point that gives way, usually leaving a key fragment deep in the plug.
Watch for these three situations: - A frozen lock, first thing on a cold day. - A summer door that has moved and is binding. - A key that turns halfway, then sticks.
There is a free answer to each further up this page. If they have not worked, the honest next move is a phone call, not more effort.
Use the Right Thing to Lubricate It
For a lock that feels dry or gritty, reach for graphite or a PTFE-based dry spray designed for locks, never a general-purpose oil. That is the whole rule, and the reasoning is worth knowing because the oily can in the cupboard is usually the nearest thing.
Why Not Oil
Oil-based products attract dust. Each time a key goes in, a little more grime sticks to the film, and eventually the oil and dust together gum up the keyway and the pins. The quick fix becomes the long-term cause. In winter it is worse still, because oil thickens in the cold and makes a frosty lock stiffer.
How to Apply It
- A small amount into the keyway, not a flood.
- The key pushed in, pulled out, and turned several times so the lubricant reaches every pin.
- The key wiped afterwards.
One honest limit: stiffness that returns within days means lubricant was treating a symptom of wear.
Getting the Lock Looked At
The quickest route to an answer is to tell us what the key is doing, whether the spare matches it, and what the door does when it is open, because from those three we can usually name the fault on the call. Nothing above was a formality, and what you found will save time now.
Worth knowing before you call: those three answers, and whether the door is uPVC, composite or timber.
There is never a call-out charge. Calls are taken around the clock, 24 hours a day and 365 days a year, and you are quoted a price on the call from your description. Each technician is DBS checked, and public liability insurance covers the work.
Describe What the Key Is Doing · 01424 571056 Alternatively, call or message B.T Locksmiths Hastings on the contact page.
Key and Lock Questions
Why will my key not turn in my uPVC front door?
The key may be waiting for the handle to reach its fully raised position. On most composite doors, as with uPVC models, lifting operates the locking points. Before trying another turn, check that the upward movement is complete rather than stopping with the handle only partway up.
Is it safe to use WD-40 on a lock?
WD-40 may loosen a stiff lock briefly, but that does not make it a lasting solution. Oil-based products attract dust, and the resulting mixture gradually gums up the keyway. If the lock feels easier afterwards, treat that as short-term relief rather than evidence that the stiffness has been resolved.
My key goes in but only turns halfway. What should I do?
Stop turning the key as soon as it stops halfway. Do not try to complete the turn with extra effort or repeat the same attempt. If help is needed, a qualified locksmith can assess it. Explain that the key goes in but will only make a partial turn.
How do I get a key out that will turn but not come out?
Return it upright with a gentle turn. That brings the lock plug back to rest, which is the only position in which the key can be removed. The fact that it rotates does not change this requirement; finish the return movement before attempting to withdraw it.
Can I pour hot water on a frozen lock?
A frozen lock should not be treated by pouring hot water over it. Stop before doing that and ask a qualified locksmith for guidance if assistance is needed. Give a clear account of the frozen lock and any action taken so far.
How can I tell if my key is worn out?
Start with a side-by-side check against a newer key or the spare. Compare their appearance directly instead of trying to remember how the older one used to look. Keep both available if you need a qualified locksmith to help assess the suspected wear.