Multipoint Lock Repair & Replacement in London
Door Gearbox Repair and Other Multipoint Faults We Fix
Worn-Out Gearbox
The lock case inside the door wears out, leaving a stiff, floppy or stuck handle. We test it and fit a matching replacement gearbox.
Gearbox ReplacementHooks and Bolts Missing Their Keeps
The door looks shut but is not secure, because a hook or bolt is not catching. We realign the keeps and adjust the door so every point locks.
Keep AlignmentLocked but Will Not Open
A door that locks but will not unlock usually has a jammed mechanism, a broken spring or a worn cam. We free it and replace the faulty part.
Jammed Door ReleasedSnapped Keys and Bad Cylinders
The cylinder drives the whole system. A worn or broken one stops everything, so we remove it, test the cam and fit a correctly sized replacement.
Cylinder ReplacementPatio and French Doors
Sliding and French doors have their own hook and bolt systems. We repair or replace them so the doors lock firmly and move freely.
Patio Door SystemsComposite, Timber and Aluminium Doors
Multipoint locks are not only on uPVC. We repair them on composite, timber and aluminium doors too, matching parts to the make.
All Door TypesMultipoint Lock Repair: Finding the Real Fault First
Multipoint Lock Replacement When Repair Is Not Enough
Gearbox and Strip Replacement
Where the whole mechanism is worn, we fit a matching gearbox and locking strip, usually on the same visit.
Security Upgrade Options
While we are there, we can fit a TS007 3-star cylinder and check the keeps and handles for weak spots.
12-Month Workmanship Guarantee
Parts we supply and fit are covered for 12 months, with a written record of the work.
Test Every Point, Fix the Failed Part
Tell Us What the Door Does
Does the handle lift, does the key turn, and is the door locked shut right now? A photo of the door edge helps us identify the system.
Advice on securing it meanwhileWe Test and Quote
We test each part, find the one that failed and give you a written price before any work begins.
Cause explained simplyWe Repair and Align
The faulty part is replaced, the door aligned and every locking point tested with you from both sides.
Tested inside and outHow Much Does a Multipoint Lock Replacement Cost?
For dropped doors or keeps that no longer line up.
- Hinge adjustment
- Keep and strip alignment
- Moving parts lubricated
- Every locking point tested
For stuck handles, failed gearboxes and broken locking strips.
- Fault found on site
- Gearbox or strip replaced
- Cylinder replaced if needed
- Locking points tested
For worn or damaged systems where repair is not practical.
- Whole lock assembly replaced
- Handles and cylinder supplied
- TS007 3-star option
- 12-month workmanship guarantee
Written Price Before Work
Our price covers your area with no congestion charge, parking or travel extras.
Multipoint Lock FAQs
What is a multipoint lock?
A multipoint lock secures the door at several points along its edge, not just at the handle. Lifting the handle pushes hooks, bolts or rollers into keeps in the frame, and turning the key locks them in place. It seals the door better and is much harder to force than a single lock.
How much does a multipoint lock replacement cost?
Replacing a uPVC multipoint mechanism usually costs around £120 to £250 in normal hours, according to a 2026 BestBuilders guide, and longer or rarer mechanisms cost more. We identify your exact make and size first and give you a written quote before fitting anything.
How do I measure a multipoint lock?
You need the backset (edge of the door to the centre of the spindle), the centres (spindle to the centre of the keyhole), the faceplate width and the overall length. Getting any one wrong means the part will not fit, so we measure on site and match it for you.
The key turns but the door won’t open. What is wrong?
Usually the gearbox has broken inside, so the key and handle no longer move the bolts. A snapped cam on the cylinder can cause the same problem. Do not force the handle. We release the door, find which part has failed and replace it.
Why won’t my door lock unless I lift the handle?
That is how multipoint doors are designed: lifting the handle moves the bolts into position before the key locks them. If the handle will not lift, or the key will not turn after lifting, the gearbox may be worn, the door may have dropped or the keeps may be out of line.
Can a multipoint lock be repaired, or must it be replaced?
Often one part is at fault, such as the gearbox, a spring, the cylinder or a keep, and that part alone can be replaced. A full replacement is only needed when the strip or case is badly worn or damaged. We test first and always quote the repair option.
Is it dangerous to leave a faulty multipoint lock?
It can be. A door that does not fully lock leaves you open to burglary, and a jammed lock can stop you getting out in an emergency. If the door will not lock, call us and we will make it secure as soon as we can, including out of hours.
Adjust, Repair or Replace?
Not sure whether your door needs an adjustment, a new gearbox or a full replacement? Call us for clear advice.
020 3831 5477Direct Line
Speak to a Locksmith
Book a Multipoint Lock Repair in London
✓ CHAS · SafeContractor · Constructionline Gold