Door won’t lock?
Common uPVC & Composite Door Problems We Repair
Most customers do not know the exact part that has failed. They simply know the door will not lock, the handle feels wrong or the key does not work properly. We can diagnose the issue and explain the best repair option.
Composite door won’t lock
Door handle won’t lift
Door handle feels stiff or floppy
Key turns but the door will not lock
Door locks when open but not when closed
Door will not close properly
Door is catching on the frame
Door has dropped or become misaligned
Multipoint lock is jammed
Door is stuck locked or stuck open
Gearbox has failed
Repair-first diagnosis
What We Can Repair
In many cases, the whole door does not need replacing. The issue may be caused by alignment, a failed gearbox, worn handles, a faulty cylinder or a damaged multipoint mechanism. We inspect the door properly before recommending a repair.
Need help now? Call first — it is the quickest way to get advice and arrange attendance.
Multipoint locking mechanisms
uPVC door gearboxes
Composite door gearboxes
Door alignment and adjustment
Dropped doors
Stiff or faulty handles
Door keeps and strike plates
Euro cylinders
Hinges
Jammed locking mechanisms
Doors that lock when open but not when closed
Simple explanation
Why Your uPVC or Composite Door May Not Lock
These are the most common causes we check when a uPVC or composite door will not lock correctly.
Misaligned or Dropped Door
If the door has dropped or moved out of alignment, the locking points may not line up with the frame. A common sign is that the door locks when open but will not lock when closed.
Failed Gearbox
The gearbox is the central part of many multipoint locking systems. If it fails, the handle may not lift properly or the key may turn without locking the door.
Worn Multipoint Mechanism
A multipoint mechanism operates several locking points along the edge of the door. If the mechanism becomes worn, jammed or damaged, the door may become difficult or impossible to lock.
Faulty Handle or Cylinder
Sometimes the problem is not the full mechanism. A worn handle, spring cassette or cylinder can make the door feel stiff, loose or unreliable.
How it works
How Our Door Repair Service Works
1
Call Us Immediately
For the fastest help, call us first and explain what is happening with your uPVC or composite door.
2
Diagnosis
We check whether the issue is caused by alignment, gearbox, handle, cylinder or multipoint mechanism.
3
Clear Quote
We explain the repair options and price before carrying out the work.
4
Repair & Testing
We repair or replace the necessary parts and test the door so it locks and closes correctly.
Door Stuck Locked or Won’t Secure?
If your front or back door is stuck locked, jammed open or cannot be secured, this can quickly become an urgent security issue. We operate 24 hours a day, 7 days a week, including holidays, for uPVC and composite door lock problems.
Do not wait for a callback if the door cannot be secured — call now.
Local 24/7 service
Areas We Cover
We provide uPVC and composite door lock repairs across Surrey, Berkshire, Buckinghamshire, Hampshire, Oxfordshire, Kent, South West London, North West London and West London.
Surrey
Berkshire
Buckinghamshire
Hampshire
Oxfordshire
Kent
South West London
North West London
West London
If you are nearby and need help with a uPVC or composite door that will not lock, call us and we will confirm availability straight away.
Questions
uPVC & Composite Door Repair FAQs
Why won’t my uPVC door lock?
The most common causes are door misalignment, a failed gearbox, a worn multipoint mechanism, a faulty handle or a cylinder issue. If the door locks when open but not when closed, alignment is often the problem.
My door handle won’t lift. What does that mean?
A handle that will not lift can be caused by a jammed multipoint mechanism, failed gearbox, dropped door or alignment issue. It is best not to force the handle, as this can cause further damage.
Can you repair a multipoint lock?
Yes, we repair and replace multipoint locking mechanisms, gearboxes and related door hardware on uPVC and composite doors.
Do I need a new door?
In many cases, no. A door that will not lock can often be repaired by adjusting the door, replacing the gearbox, repairing the mechanism or replacing worn hardware.
My key turns but the door does not lock. Can you help?
Yes. This can be caused by a failed gearbox, cylinder fault or multipoint mechanism problem. We can inspect the door and identify the correct repair.
Can you repair composite doors as well as uPVC doors?
Yes, we repair both uPVC and composite door lock problems, including multipoint mechanisms, gearboxes, handles, cylinders and alignment issues.
What should I do if my door is stuck locked?
Avoid forcing the handle or key. Call us immediately if the door is stuck locked, jammed open or cannot be secured. Forcing the door can damage the mechanism, handle or frame.
Can I send photos before you come out?
Yes, but if the door will not lock or cannot be secured, calling is always the fastest option. Photos can help, but a quick call lets us understand the issue immediately.
Related services
Other Helpful Locksmith Services
Need Help With a uPVC or Composite Door That Won’t Lock?
Whether the door is jammed, misaligned, difficult to close or the handle will not lift, the fastest and safest next step is to call us now. We operate 24/7, including holidays.