You lift the handle and nothing happens. No resistance, no click, none of that solid clunk you get when the hooks shoot out of the edge of the door. On some doors the lever carries on turning right the way round, over and over, like a tap with nothing plumbed to it.
The lever has come adrift from the thing it is meant to be driving. Nine times out of ten that is a five minute diagnosis and a small part, so before anyone talks you into a new door, here is what is going on inside.
The square bar that does all the work
Take the inside handle off a uPVC door and you will find a short square steel bar running through the middle of it, usually 8mm across. That is the spindle. It passes from the outside handle, through the door and through the lock case buried in the door edge, and out into the inside handle. The two handles are not connected to each other except through that bar.
Inside the lock case, the multipoint gearbox has a square hole in it called the follower, and the spindle sits in that hole. Lift the handle, the spindle rotates, the follower rotates, and a set of cams and gears converts that turn into vertical travel along the locking strip, which pushes the hooks or rollers out into the keeps on the frame.
Everything your handle does, it does through that one bar.
The three faults, and they are the only three
A sheared spindle. Steel is strong but 8mm is not much, and all the twisting force concentrates where the bar enters the follower. On a door that has gone stiff, where you have been leaning on the handle to get it up, the bar eventually twists and snaps at that exact spot. You are left with one half of it still sitting in the follower and the other half turning uselessly in a handle.
A stripped handle. The square socket inside the handle rounds off. This is wear rather than a break, and it is far more common on cheap handles than good ones. The corners of the square hole get worn away until the spindle simply turns inside it without carrying it round.
A failed gearbox cam. Here the handle and spindle are both fine and the gearbox they drive has given up. A cam or a gear inside the case has broken, so the follower turns and nothing downstream of it moves. This is the dearest of the three and the one most often misdiagnosed as a handle problem.
How to work out which one you have without taking anything apart
Three questions will usually get you there.
Does it spin all the way round, repeatedly? A handle that is properly engaged cannot do a full 360, because the gearbox stops it. If yours goes round and round with nothing stopping it, the connection has failed before the gearbox: sheared spindle or stripped handle.
Does it spring back? Lift it and let go. If it drops with a definite thump, a return spring is still doing its job, which means something is still connected. If the lever stays wherever you leave it, floppy and dead, nothing is engaged at all.
Does the other side still work? This is the useful one. Try the handle on the opposite face of the door. If the inside handle lifts the mechanism normally and only the outside one spins, the spindle has sheared partway along and the inside half is still gripping the follower. That is the classic signature of a broken spindle. If both handles spin freely, suspicion moves to the follower or the gearbox itself.
Why it went in the first place
Two root causes come up again and again on doors round Wishaw and Motherwell.
The first is spindle length. Spindles come in a range of lengths to suit different door thicknesses and different handle backplates. Fit one that is slightly too short and it only just catches in the follower, a couple of millimetres of engagement instead of a proper seat. All the load bears on that tiny bit of contact and it chews the corners off the bar. Too long is no better, because the handles cannot be drawn fully home and you get the same partial engagement at the other end. A handle fitted with whatever spindle happened to be in the van will often work perfectly for a year and then start slipping.
The second is the handle itself. A lot of budget handles are die-cast zinc alloy, and zinc is softer than the hardened steel spindle running through it. Every lift is metal grinding on metal, with the softer one losing. A handle with a steel insert in the socket lasts a great deal longer, and the price difference is small.
Underneath both sits a stiff door. If the mechanism is fighting you, every operation puts far more twist through the spindle than was ever intended, and a handle that gets harder to lift over a period of weeks is telling you about alignment rather than about itself.
Can you still lock up, and how urgent is it?
Often you can, at least partly. If one handle still drives the gearbox, you can normally throw the hooks from that side, and plenty of people carry on for a few days locking up from the inside.
What matters is that on nearly all uPVC multipoint doors the hooks are engaged by lifting the handle, not by the key. The key only locks the mechanism once the handle has done its part. So a door where neither handle works has its hooks in, however many times you turn the key. It is on the latch and the deadbolt, no more than that.
A spinning handle on a door you can still shut and secure is annoying rather than an emergency. It will keep.
A door standing open is different, particularly if the hooks were thrown out before the handle failed. Hooks sticking proud of the door edge will not pass the frame, so the door physically cannot be pulled to, and you have an open doorway you cannot close. Say so when you ring, because we treat that differently.
What we check first
The first thing we do on arrival is take the handle off and look at the end of the spindle and the inside of the socket. Then we turn the follower directly with a test spindle. If the mechanism runs sweetly on the test bar, the gearbox is sound and you need a handle and a correctly sized spindle. If it does not, the gearbox is the fault, and that is still a repair rather than a new door.
No call out charge, and we cover Wishaw, Motherwell and the surrounding Lanarkshire towns. A photo of the handle from the side, plus one of any maker’s name stamped on the long metal faceplate in the door edge, tells us what to bring. Send them on WhatsApp, or the phone is 01698 604 278, Monday to Friday.
A spinning handle is usually a snapped spindle or a worn gearbox, and either way it is a straightforward door repair.
Related advice
See our door repair service page for what we do and where. If you would rather just ask, get in touch.
More like this: browse all fifty guides in our window and door advice section.
Written by the team at Wishaw Window Repairs. Over thirty years repairing uPVC windows and doors across Lanarkshire.