Anti-snap cylinder and labour included.
Lock repair & replacement
Key won't turn, lock feels wrong, or time for a security upgrade?
Euro cylinder replacement, anti-snap upgrades, mortice locks, broken key extraction and burglary-related lock repairs across Sale and Greater Manchester. LockMend checks whether the fault is the cylinder, the key, the mechanism or alignment before parts are changed.
- No call-out fee
- Price agreed before work starts
- Anti-snap as standard
- Sale & Greater Manchester
Timber-door lock replacement.
Ultion, ABS or Avocet options.
No call-out fee. Price agreed first.
Cylinder first, mechanism checked when needed
A lock fault is not always just the visible barrel. If the key turns but the locking points do not move, the door mechanism may be involved. If the cylinder is damaged, lost-key compromised or not anti-snap rated, replacement can be the sensible route.
Describe what the key does, whether the door opens, and whether the property is secure. A photo of the cylinder and handle helps confirm the likely part.
Fault diagnosis
Six common door lock symptoms
The useful distinction is simple: cylinder, key, mechanism, alignment or security upgrade. Guessing wrong wastes time and parts.
01
Key is stiff, won't go in, or won't turn
The key resists insertion or rotation, either suddenly or gradually over months.
Cause and repair route
- Likely cause
- The cylinder barrel may be worn, dry, dirty or corroded, especially on exposed doors.
- Repair route
- A light service may be enough in mild cases. If the cylinder is worn or unreliable, replacement is usually the cleaner route.
02
Key turns but the door won't lock
The key rotates, but the hooks, rollers or bolts do not engage properly.
Cause and repair route
- Likely cause
- This is usually a gearbox or multipoint mechanism fault, not a cylinder-only fault.
- Repair route
- LockMend checks the mechanism before changing the cylinder so the wrong part is not fitted.
03
Lock damaged after a break-in or forced entry
The cylinder is snapped, drilled, forced, loose or the door cannot be secured properly.
Cause and repair route
- Likely cause
- Forced entry can damage the cylinder first, but the connected mechanism and door furniture also need checking.
- Repair route
- Damaged cylinders are removed and replaced with an anti-snap option where practical. Security comes first.
04
Can't double-lock, or the key turns too far
The key reaches one position but not the full double-lock position, or over-rotates with little resistance.
Cause and repair route
- Likely cause
- Cylinder cam wear, internal barrel damage or alignment stress can stop the lock engaging cleanly.
- Repair route
- The cylinder and door alignment are checked together before the repair route is agreed.
05
Security upgrade, lost keys, or insurance check
The lock still works, but keys are missing, a burglary happened nearby, or the cylinder looks outdated.
Cause and repair route
- Likely cause
- A standard euro cylinder without anti-snap protection may be the weakest part of an otherwise decent door.
- Repair route
- Anti-snap replacement is the practical upgrade. Lost or stolen keys usually mean cylinder replacement, not rekeying.
06
Key snapped or stuck inside the cylinder
Part of the key is trapped in the barrel, or the spare key will not enter cleanly after a snap.
Cause and repair route
- Likely cause
- The key may have fractured under strain from a worn cylinder, dirt, corrosion or door alignment pressure.
- Repair route
- The fragment is extracted where possible, then the cylinder is tested. If the barrel is damaged, replacement is confirmed before work continues.
Important distinction
If the key turns but the door will not lock, the cylinder may be doing its job. The gearbox or multipoint mechanism may be failing behind it. A new cylinder will not fix a mechanism that no longer moves the locking points.
Not sure if it is the lock or mechanism?
Send the symptom, door type, postcode and a photo of the cylinder or handle. LockMend can usually separate cylinder faults from mechanism faults before attending.
Lock types
Euro cylinder, mortice lock or multipoint cylinder?
Different lock types need different repair routes. The visible key barrel may be replaceable on its own, or it may only be the part that operates a deeper mechanism.
Useful photo detail Show the cylinder, handle and door edge
A clear photo can help confirm whether the likely part is a euro cylinder, mortice lock, handle set or multipoint mechanism.
Euro cylinder
uPVC and composite doors · most common
Lock notes
The removable barrel the key goes into. It is held by a central screw and operates the multipoint mechanism behind the handle. When it fails, the door usually does not need replacing.
Mortice lock
Timber doors · often insurance-led
Lock notes
A mortice lock sits inside a recess cut into a timber door edge. Many final-exit timber doors need a BS3621-rated 5-lever mortice lock for insurance compliance.
Multipoint cylinder
Cylinder plus full locking strip
Lock notes
The cylinder turns the internal gearbox and locking strip. If the gearbox has failed, changing only the cylinder will not make the hooks or bolts move again.
How to measure a euro cylinder
Useful, not mandatory
Lock notes
Open the door and measure from the centre fixing screw to each end of the barrel. Tell LockMend both numbers, for example 35 outside and 45 inside. If unsure, a photo is enough to start.
Anti-snap cylinders
Why the cylinder matters for uPVC and composite doors
On many modern doors, the multipoint mechanism can be strong while the cylinder remains the weak point. That is why anti-snap replacement is treated as the standard upgrade route.
How a standard cylinder can be defeated
Read the sequence
If a euro cylinder protrudes beyond the backplate, the outer section can be gripped and snapped. Once the inner core is exposed, the door can be opened without breaking the glass or door panel.
- Cylinder protrudes beyond the backplate
- Outer section is gripped and snapped
- Inner core is turned directly
How an anti-snap cylinder helps
Read the sequence
An anti-snap cylinder is designed to break at a controlled outer point while the protected inner section stays inside the door. The attacker is left without access to the part that turns the lock.
- Outer section breaks at the sacrificial line
- Inner operating section stays protected
- Door remains locked and the cylinder is replaced
Honest assessment
Repair when sensible, replace when it actually protects you
A stiff lock is not automatically a new lock. But an old, damaged or non-anti-snap cylinder is often better replaced than repeatedly serviced.
Repair cases
- Cylinder is stiff but undamaged and may respond to PTFE or graphite lubrication
- One worn key is the issue while other keys still operate the cylinder cleanly
- The lock body is loose and needs tightening or minor alignment work
- The real fault is the door mechanism, not the lock cylinder
Replacement cases
- Cylinder is cracked, drilled, snapped or visibly forced
- Keys have been lost or stolen and the old keys must be excluded
- The cylinder is old, generic or not anti-snap rated
- Insurance requires TS007 or BS3621-rated hardware for the door type
Exact route depends on door type, cylinder size, security level and whether the connected mechanism is still operating correctly.
Transparent pricing
Lock repair and replacement pricing
Typical starting prices for Sale and Greater Manchester. The exact price is confirmed before work starts, not after the lock is already apart.
Service Typical cost
Euro cylinder replacement — anti-snap From £75
High-security cylinder upgrade From £120
Mortice lock replacement From £95
Broken key extraction From £75
Burglary repair — emergency cylinder change From £75
Cylinder service From £55
Security-first value
Anti-snap is the standard replacement route
For a standard euro cylinder replacement, LockMend treats anti-snap as the default option rather than an upsell. If you need a named 3-star cylinder, the upgrade route is confirmed before attendance.
For timber doors, the right question is usually BS3621 compliance rather than anti-snap cylinder protection.
FAQ
Lock repair and replacement questions
Short answers about euro cylinders, anti-snap locks, mortice locks, mechanism faults, pricing and insurance-related lock choices.
Do I need to replace the whole lock or just the cylinder?
In many uPVC and composite door cases, only the euro cylinder needs replacing. The cylinder is the removable barrel the key goes into, not the full multipoint mechanism inside the door. If the mechanism or gearbox has failed, that is checked as a separate repair route before the wrong part is changed.
What is an anti-snap cylinder and do I need one?
An anti-snap cylinder is designed to break at a controlled outer point during a snap attack while the inner operating section stays protected inside the door. If your cylinder protrudes beyond the outside backplate or is not anti-snap rated, an upgrade is usually worth discussing.
My key turns but the door won't lock — is that the lock or the mechanism?
That is usually a door mechanism or gearbox fault, not a cylinder-only fault. The cylinder can still turn normally while the multipoint strip no longer moves the hooks, rollers or bolts. Replacing only the cylinder will not fix a failed mechanism.
How much does a lock replacement cost in Sale?
Typical euro cylinder replacement starts from £75 including an anti-snap cylinder and labour. Mortice lock replacement starts from £95, high-security cylinder upgrades start from £120, and broken key extraction starts from £75. The exact price is confirmed before work starts.
Does my home insurance require a specific type of lock?
Many policies ask for a BS3621-rated 5-lever mortice lock on timber final-exit doors. For uPVC and composite doors, some policies specify a TS007-rated cylinder. The correct requirement depends on the door and your own policy schedule.
Can a uPVC door lock be repaired rather than replaced?
Sometimes. A stiff but undamaged cylinder may respond to correct lubrication or minor adjustment, and a worn key may simply need replacing. If the cylinder is cracked, drilled, snap-damaged, very worn or keys have been lost, replacement is usually the safer option.
What cylinder brands can LockMend discuss?
Common anti-snap and high-security cylinder brands include Ultion, ABS, Avocet ABS, Yale Platinum and ERA Fortress. Standard cylinder brands can include ERA, Union and Fullex. Less common sizes or models may need availability checked before attendance.
Why does my lock become difficult to use in cold weather?
Cold weather can make existing cylinder wear or door alignment stress more obvious. PTFE or graphite spray can help mild stiffness, but WD-40 is not ideal because it can attract dirt. If stiffness keeps returning, the cylinder, keys and door alignment should be checked.
Next step
Need a lock repaired, replaced or upgraded?
Send what the key or lock is doing, where you are and whether the property is secure. LockMend covers Sale and the wider Greater Manchester area during Every day 08:30–18:30.