If your uPVC door handle feels floppy or will not lift, a common cause is a faulty gearbox or a door alignment issue. The gearbox is the central component of your door locking system, and MLA estimates for replacing it run from £145 to £335 including labour, depending on the symptoms and the gearbox model. The Master Locksmiths Association states that the door handle itself is rarely the problem.
What the gearbox does
The gearbox is the central part of the multipoint locking mechanism inside a uPVC or composite door. When you lift the door handle, the gearbox is the component that moves the hooks and bolts along the door edge into their secure positions. The euro cylinder is the barrel where you insert your key.
Most modern uPVC and composite doors use this multipoint system. This is very different from older timber doors, which typically use a mortice deadlock and sashlock fitted inside the wood, or a night latch or rim lock mounted on the surface. A surface latch is often called a Yale lock and uses a separate rim cylinder to turn the mechanism.
The MLA says a floppy handle is usually caused by a faulty gearbox, normally a broken spring.
Signs of a failed gearbox
The MLA describes these symptoms.
Look out for these signs when trying to lock up:
- A door handle that feels floppy, crunchy or gives when you press it
- A handle that only lifts partway so the key will not fully turn
- A handle that lifts normally when the door is open but not when it is closed
- A door that will not lock even when it is standing wide open
These signs mean the central mechanism has failed or is struggling to engage the hooks. You usually will not need a new door handle to fix the problem.
Alignment or gearbox
A door that will not lock when closed is often due to an alignment issue rather than a broken part. Weather can shift a uPVC door by 1 to 2 mm, which stops the locking points from lining up with the keep on the frame.
If the door will not lock even when it is open, uPVC gearbox failure is the most common reason. A locksmith experienced with uPVC doors can tell which it is.
An alignment fix involves adjusting the hinges, keep or roller points. This typically takes 15 to 20 minutes and is much cheaper than fitting new parts. The MLA says an unadjusted door can lead to gearbox failure.
Typical 2026 prices for a gearbox
The cost of the job depends on the exact make of the gearbox and the locksmith's labour rate. Prices are driven by the time of day, as evenings, nights, weekends and bank holidays cost more. Location is also a factor, with London and the South East carrying higher labour charges.
The table below shows estimated costs from the Master Locksmiths Association based on the symptoms your door has.
|
Repair or replacement job |
Estimated price |
|---|---|
|
Alignment or adjustment |
From £80 |
|
Gearbox repair |
From £85 including VAT |
|
Gearbox replacement for a floppy handle |
£145 to £280 including labour |
|
Gearbox replacement when handle will not lift |
£175 to £335 including labour |
These figures are estimates published by the Master Locksmiths Association for the stated year and local quotes will differ. Their two pages on handle replacement do not say whether their replacement figures include VAT. This is why you must always ask a locksmith to confirm if VAT is included in their quote before work begins.
Typical 2026 market rates do include VAT. They are shown in a separate table because they measure something different from the MLA figures, so read them separately.
|
Part or service |
Estimated price including VAT |
|---|---|
|
Gearbox part only |
£40 to £120 |
|
Gearbox replacement including the part |
£120 to £250 |
|
Multipoint mechanism repair (rest of the UK) |
£120 to £250 |
|
Daytime labour per hour |
£65 to £95 |
These are typical prices for 2026 and local quotes will differ. If you need a locksmith outside of normal working hours, you should expect to pay roughly £110 to £130 per hour for labour. Many locksmiths charge no separate call-out fee but some do, so you must ask on the phone.
When the whole multipoint lock is replaced
In most cases, a locksmith only needs to replace the central gearbox to get your door working again. The MLA says some multipoint locks need the entire mechanism replaced.
A full uPVC multipoint mechanism supplied and fitted typically costs between £150 and £350 in the rest of the UK, and more in London and the South East.
An honest locksmith will check if the gearbox can be swapped before quoting for a full replacement. If they tell you the whole strip needs changing, ask them to explain why. You can read more about these broader issues in our guide to uPVC door lock problems.
How long the job takes
Replacing a uPVC gearbox takes approximately 30 minutes or more depending on the door type.
French doors can take longer. Adjusting a misaligned door is much faster and typically takes just 15 to 20 minutes. Most single lock changes and lockouts take well under an hour.
Ask the locksmith whether they have the right gearbox for your door and whether the job can be finished in one visit. The MLA says the price depends on the gearbox model, so ask for a quote beforehand.
Why doors fail in hot and cold weather
Weather can affect uPVC doors. Cold weather causes the plastic frame and door panel to contract, while heat makes them expand. Because a multipoint lock relies on precise positioning, a shift of just 1 to 2 mm is enough to stop the hooks and bolts from sliding smoothly into the frame.
Do not force the handle if the door is hard to lock in hot or cold weather. You might also experience this with composite door lock problems as they use similar multipoint mechanisms.
If your door only becomes difficult to lock during extreme temperatures, call a locksmith to adjust the hinges and keep. Alignment costs less than a gearbox replacement, and the MLA says an unadjusted door can lead to gearbox failure.
Upgrading your cylinder during the repair
If you are having the gearbox replaced, ask the locksmith whether fitting a new cylinder at the same time would cost less than doing it separately.
It is a good time to check your door security. A basic euro cylinder can be vulnerable to lock snapping.
If your current cylinder is basic, ask the locksmith to fit a snap-resistant model. The recognised standards for euro cylinders are TS007 three star, or a one-star cylinder paired with two-star handles. An alternative standard is Sold Secure SS312 Diamond. If you have timber doors elsewhere, the equivalent British Standard for mortice and rim locks is BS3621, shown by a Kitemark on the lock faceplate. You can also ask for your new cylinder to be keyed alike with your back door, meaning one key opens both locks.
How to get a fair quote and avoid scams
There is no government licensing of locksmiths in the UK, which means anyone can trade as one. The Master Locksmiths Association runs a voluntary approval scheme where approved companies are vetted, have criminal record checks, employ locksmiths who have passed exams and are inspected regularly.
Vetting matters because the industry has common scams. Be wary of national call centres advertising as a local locksmith and passing the job to whoever is nearest. They often quote a very low price on the phone that multiplies on the doorstep. Other bad practices include drilling a lock that could have been opened without damage, which is called non-destructive entry.
Under the Consumer Rights Act 2015, a service must be carried out with reasonable care and skill, at a reasonable price if none was agreed, and within a reasonable time. You have a right to have poor work put right or your money back. Under the Consumer Contracts Regulations 2013, there is normally a 14-day cancellation period for work arranged at home or by phone. This does not apply where you specifically asked for a visit for urgent repairs, although extra work sold during that visit is not covered by the exception.
Watch out for these warning signs when hiring a locksmith:
- Refusing to give a total price including parts, labour and VAT before starting
- Arriving in an unmarked vehicle with no company ID
- Demanding cash only and refusing to provide a written invoice
- Replacing a whole multipoint mechanism when only the gearbox had failed
- Fitting cheap cylinders at premium prices
- Having no real local address or consistent customer reviews over time
Make sure you contact a domestic locksmith rather than an auto locksmith. Auto locksmiths are a separate specialism covering vehicle entry, key cutting, transponder and remote programming,
Do not force the handle
If your door handle feels stiff or will not lift, do not force it. The MLA advises not to force the handle or the lock.
Do not force the key in the euro cylinder either. Forcing the key could make the problem worse.
Leave the door as it is and call a locksmith who is experienced with uPVC doors. They will diagnose the exact fault and advise whether a repair or replacement is needed.
Common questions
Can I just replace the uPVC door handle?
The handle itself is rarely the cause of a floppy or jammed mechanism. A replacement handle usually costs from £20 plus labour, or from £40 for a high security version. You can find more details in our guide on how much uPVC door handle replacement costs.
Is it cheaper to repair or replace a gearbox?
The Master Locksmiths Association notes that a gearbox replacement may actually be cheaper than a repair. Ask your locksmith to compare the two prices before you agree.
Does my home insurance cover a broken door lock?
This depends on your policy wording. Insurers often ask what locks are fitted, so check your own documents to see what your policy expects regarding wear and tear.
Can a landlord change the locks without telling me?
A landlord who changes the locks to keep a tenant out without a court order commits illegal eviction, which is a criminal offence. Tenants should check their tenancy agreement and get the landlord's agreement before changing locks themselves. Contact Citizens Advice or Shelter for guidance on your specific housing situation.
Next steps
Follow these steps if your uPVC door is difficult to lock or the handle feels loose.
- Note how the handle feels and when the door will not lock, so you can describe it clearly
- Check if the door locks normally when open but not when closed, pointing to an alignment issue
- Call a local locksmith and describe exactly how the handle feels and acts
- Ask for a total price covering the gearbox part, labour and VAT before agreeing to a visit
- Ask what standard any new euro cylinder meets if you choose to upgrade it
If the door cannot be locked and it is late at night, you will pay a premium for an emergency call-out. If the door is secure and you can use another entrance, wait until normal working hours to get a daytime labour rate. Take a moment to find a locksmith near you who has strong local reviews and clear pricing.
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