WHAT RE‑GEARING A MULTIPOINT DOOR LOCK MEANS
A multipoint lock runs the full height of your door edge. The visible faceplate carries hooks, bolts or rollers that engage with metal keeps on the frame. In the middle sits the gearbox—the part the handle turns, linking the cylinder and spindle to all locking points. See our simple guide to locking mechanisms.
Re‑gearing means we replace the failed gearbox and correctly re‑align the door and keeps—without swapping the whole strip unless it is genuinely required.
- Typical causes of stiffness or failure: wear, seasonal movement, slammed doors, dry or over‑oiled mechanisms.
- Common on uPVC and composite doors and usually straightforward to fix.
CLEAR SIGNS YOU NEED A NEW GEARBOX AND REALIGNMENT
- Stiff handle or a key that is hard to turn.
- Needing to lift the handle higher than before.
- Locks only on the latch; hooks/bolts not engaging.
- Grinding noises or the handle not springing back.
- Key spins or will not return.
Quick check: try locking the door while open. If it locks smoothly open but not closed, the door is out of line. Look for frame rub and shiny wear marks on the keeps. Early attention prevents a jam—locked or unlocked. Read our early warning signs and our safe opening guide if your door will not budge.
OUR STEP‑BY‑STEP PROCESS: SAFE OPENING, GEARBOX SWAP, PRECISE ALIGNMENT
- Safe opening: we open jammed multipoint doors without damage.
- Diagnosis: identify the lock pattern and isolate the fault (gearbox, cylinder or alignment).
- Spec confirm: measure backset, spindle size and brand pattern so the new gearbox matches perfectly.
- Clean swap: remove the old gearbox and fit the new one carefully—no forcing.
- Alignment: adjust hinges, set keeps for height and pressure, and toe‑and‑heel glazing if the sash has dropped.
- Testing: smooth handle lift, full hook/bolt engagement, correct closing pressure and key turn from both sides.
Learn more about our door lock repairs and replacements.
This image was generated with AI and may not always represent the product or service exactly.
COSTS, TIME AND DISRUPTION: REPAIR VS REPLACEMENT
- Re‑gearing costs a fraction of a full strip replacement—you pay for the gearbox and skilled alignment, not a whole mechanism.
- Cleaner and faster: minimal disruption and no alteration to the door or frame.
- Clear pricing once we identify your lock and the alignment work required.
- Most repairs completed in one visit with van‑stocked parts; if a special gearbox is needed, we secure the door and return promptly.
- Sensible guarantee on parts and labour.
SECURITY AFTER RE‑GEARING: JUST AS STRONG, OFTEN STRONGER
- New gearbox + correct alignment restores full hook/bolt engagement and seal compression—real security, not just a latch.
- We set keeps for even pressure so the door closes positively with a smooth key turn.
- Optional upgrades: anti‑snap cylinders and solid handles for better protection and feel. See our guide to anti‑snap cylinders.
WHEN A FULL REPLACEMENT MAKES MORE SENSE
- Heavily corroded strip or broken spindle with no compatible parts.
- Serious burglary damage or distorted components.
- Rotten timber or a badly distorted frame that may require a new sash or door.
We always advise the most cost‑effective route. If re‑gearing will not deliver a lasting result, we will tell you upfront and explain clear options.
REAL JOBS WE FIX EVERY WEEK ACROSS ESSEX & SUFFOLK
- Chelmsford: Stiff composite front door that only latched. Worn gearbox and low handle height from drop. New gearbox fitted, keeps raised and hinges tweaked. Result: smooth lift, full engagement and no draughts.
- Colchester: Patio door locked shut. Opened non‑destructively; collapsed gearbox and poor roller engagement due to sag. New gearbox fitted, keeps reset and toe‑and‑heel applied.
- Ipswich rental: Tenant reported a spinning key. Same‑day gearbox replacement and alignment; disruption kept to minutes.
This image was generated with AI and may not always represent the product or service exactly.
SIMPLE CARE TO KEEP YOUR DOOR LOCKING SMOOTHLY
- In hot weather, latch or lock the door when not in use to keep it true in the frame.
- Do not force a stiff handle—stop and call to prevent a jam.
- Keep thresholds and keeps free of grit.
- Avoid heavy wreaths or over‑door loads that pull the sash down.
- Use a light PTFE or graphite on the cylinder sparingly; never use thick oil in the gearbox.
- Seasonally check seals and hinges for gaps and draughts.
ANSWERS TO COMMON QUESTIONS
Will a new gearbox fit my brand of lock? Most mainstream multipoint brands have compatible gearboxes and patterns we stock or can source quickly.
Can you help if my door is locked shut? Yes—safe, non‑destructive opening is part of our service, followed by repair and precise alignment.
Do you cover my area and how soon can you come? We cover Essex and Suffolk with fast appointments, clear pricing and a sensible guarantee. For urgent help, call for the quickest route to secure your home.
GET A QUICK QUOTE FROM PLASTIC DOCTOR
For a fast, accurate price, send clear photos of:
- The faceplate with brand markings.
- The handle set and spindle position.
- The door edge showing the backset.
Tell us the symptoms (stiff handle, spinning key, latch only, jammed). The more detail you share, the fewer questions we need to ask.
Same‑day or next‑day slots are often available. You can call or email direct, or use our simple form to contact us. We will confirm availability, parts and a clear cost before booking.
RELATED DOOR AND WINDOW SERVICES THAT PAIR WELL WITH RE‑GEARING
- Fine‑tuning door alignment for better sealing and quieter closing.
- Handle replacements and higher‑security cylinders while on site.
- Checking keeps and seals for even pressure all round.
- Servicing rollers and tracks on patio and bifold doors to keep panels gliding and reduce strain on the gearbox.
FAQs
How Do I Measure The Backset On My Lock?
Measure from the edge of the faceplate to the centre of the spindle (handle). Common sizes are 28–45 mm on uPVC and composite doors. A clear photo helps us double‑check the PZ and brand.
Will Re‑Gearing Also Stop Draughts?
Often, yes. Proper alignment restores compression on the seals, which reduces draughts. If seals are perished, we can replace them during the same visit.
Can You Source Parts For Older Or Obsolete Locks?
We carry many patterns and have trade suppliers for older gearboxes. If a part is obsolete, we will offer a compatible solution or, if needed, a full strip replacement.
Is Lubrication Worth Trying Before Calling?
Light PTFE on the cylinder can help, but avoid thick oils and do not force a stiff handle. If symptoms persist, call us to prevent a full jam.
What If My Key Spins But The Door Will Not Open?
That usually points to a failed gearbox. We can open the door safely, replace the gearbox and re‑align the keeps so it locks smoothly again.
Do You Align Patio And Bifold Doors Too?
Yes. We adjust hinges, rollers and keeps, and service tracks. Correct alignment reduces strain on the lock and makes daily use easier.
How Long Does A Typical Re‑Gear Take?
Most take 60–90 minutes including alignment and testing. If a special part is required, we secure the door and return promptly to finish.
