Most uPVC door problems are sold as a new lock when they are not a lock problem at all. Three different faults produce almost the same symptom, they cost very different amounts to put right, and telling them apart takes about a minute at the door.
Tap to call — fastest way to get someone out to you
A uPVC or composite door has three separate parts that can go wrong, and the one people reach for first is usually the one that is fine.
The euro cylinder is the barrel the key goes into. If the key will not turn, or will not go fully in, or turns with a gritty feel, the cylinder is worn or damaged. This is the cheapest of the three to put right and the quickest.
The multipoint mechanism is the long strip inside the door edge carrying the hooks, rollers and deadbolt. If the key turns freely but nothing moves, or the handle lifts but the hooks do not throw, the gearbox inside that strip has failed. This is the expensive one.
The alignment is the door sitting square in its frame. If it locks when you lift and pull the door towards the frame but not when it hangs freely, nothing has failed — the door has dropped on its hinges and the hooks no longer line up with the keeps. This is an adjustment, not a part.
Before anyone comes out, try this. Open the door fully so it is hanging free of the frame, then lift the handle and turn the key.
If the hooks and bolts throw normally with the door open but not when it is closed, the mechanism is fine and the door is out of alignment. If the hooks do not move with the door open either, the gearbox has gone. If the key itself will not turn in either position, it is the cylinder.
That one test separates a sixty-pound adjustment from a full mechanism replacement, and it is worth doing before you agree to anything.
A multipoint gearbox almost never fails without notice. The handle goes stiff first — it needs a firmer lift than it used to, then a firmer one again, and that can go on for weeks or months before it gives up entirely.
Caught at the stiff stage it is often a repair, or a single replacement part with the door still working. Caught on the night it jams, the mechanism has usually failed in the locked position with you on the outside, the door frequently has to be opened destructively, and you are paying for entry plus a new mechanism plus often a new handle.
If your handle has needed a stronger lift for more than a couple of weeks, that is the cheapest moment to deal with it.
A failed gearbox does not always mean a whole new mechanism. On many strips the gearbox is a separate cassette that can be changed on its own, which costs considerably less than the full unit. Whether that is possible depends on the manufacturer and the age of the door.
The mechanisms fitted to UK doors come from a handful of makers — Yale, ERA, Fuhr, GU, Winkhaus, Maco, Avocet, Mila among them — and each uses its own spacing between the centre of the cylinder and the handle spindle, and its own backset from the door edge. A generic replacement rarely fits. Photographing the door edge with the strip visible, and any name stamped on it, is the single most useful thing you can do before calling.
Where the door itself is sound, replacing the mechanism is almost always the right answer. Replacing the whole door for a lock fault is not, and should be questioned.
Separately from whether the door works, there is the question of whether it is secure. A standard euro cylinder in a uPVC door can be defeated in seconds by snapping it, leaving very little visible damage. The industry answer is a three-star anti-snap cylinder, which breaks in a controlled place and leaves the lock still holding.
Look at the cylinder face for a kitemark and a star rating. If it has neither, it is worth upgrading regardless of whether anything has failed — it takes about fifteen minutes and it does more for the security of the house than anything else at the same cost.
If you are claiming on insurance after a break-in, the specification of the lock fitted can matter to the claim. We provide a written receipt naming exactly what went in.
Composite door slabs expand in sustained heat. A door that has locked perfectly for four years can start needing a shove in July and behave itself again in September.
That is alignment, and the fix is adjusting the hinges and the keeps rather than fitting anything new. It is worth mentioning when the problem started, because a fault that appeared during a hot spell points at the frame rather than the mechanism, and that changes the diagnosis before anyone opens the door.
Three steps, and you know the price before anyone touches the door.
What has happened, what kind of door, and where you are. You get a likely cost range and an honest arrival estimate — not a best case.
The locksmith looks at the actual lock and confirms the price. If it is more than the estimate, you hear why before work starts, and you can say no.
Door opened or lock fitted, everything tested with you there. Card or cash on completion, with a receipt and warranty.
uPVC Door Repair across Bristol, Birmingham, The Black Country.
The cylinder is working and the mechanism is not. Either the gearbox inside the multipoint strip has failed, or the door has dropped and the hooks are missing the keeps. Open the door fully and try again — if it throws with the door open, it is alignment.
Often, but not always. If the cylinder still turns there is usually a non-destructive route. If the gearbox has failed in the locked position, the door frequently has to be opened destructively because nothing inside will move. You will be told which applies before anything is drilled.
Repair, where the design allows it. On many strips the gearbox is a separate cassette that can be changed on its own. Whether that is an option depends on the manufacturer and the age of the door, and it is checked before quoting.
Almost never for a lock fault. If the frame is sound and the slab is not damaged, a new mechanism restores the door. Being told the whole door needs replacing because the lock has failed is worth a second opinion.
Open the door and photograph the long metal strip on the edge. Most carry a manufacturer name and often a part number. That photograph tells a locksmith what to bring and turns a two-visit job into one.
Yes. They run on different mechanisms to front doors and the handles are often manufacturer-specific, so mention which type it is when you call.
Not if the lock allows otherwise. Most standard cylinders and nightlatches can be opened non-destructively. Some high-security locks cannot, and if that is the case you will be told before anything is drilled, along with the cost of the replacement.
It depends on the lock type, the time of day and whether the cylinder survives. You get an estimate range on the phone and a fixed quote at the door. There is no charge if you decide not to go ahead once you have the quote.
It depends on where you are and what is already booked in. You will get a realistic time on the call, and a message if it changes.
Yes, the line is answered 24 hours. Out-of-hours rates are explained on the call, not added afterwards.
Yes, for entry to a property you live in, with proof of residence. Changing locks in a rented property usually needs the landlord's agreement, and we will tell you where that line sits.
Ask for the company name, the locksmith's name and the vehicle before they arrive. You will get a written receipt with the business address on it. If anything about a locksmith feels wrong, do not let them start work.
Yes, card or cash on completion. Payment is taken after the work is finished, not upfront.
No. We do not work on vehicles at all — no car keys, no transponder programming, no key fobs. That needs a specialist auto locksmith with different equipment, and we would rather tell you now than waste your time.
