To replace a uPVC door handle, follow these steps: Measure (PZ, screw-centres, spindle), Remove (backplate screws), Prepare (spindle length and spring cassettes), Fit (new inside and outside handles), Secure (M5 through-bolts to snug), and Test (latch and key operation). For any door maintenance, be sure to check out our uPVC doors, and our team will guide you with any type of maintenance, installation, and uPVC door designs.
Step-by-Step Guide to Replace a uPVC Door Handle
What you’ll need: No.2 Phillips screwdriver, tape measure, small hacksaw (if you must shorten the spindle), and the correct replacement handle set.
Key dimensions you must confirm before buying:
PZ (centre-to-centre): Distance from the centre of the lever spindle to the centre of the key/cylinder. On most Euro-profile uPVC doors, this is 92 mm (other common sizes: 72 mm, 92/62 mm offset on lever/pad sets).
Screw-centres: Distance between the two through-bolts that hold the backplates (varies by handle; measure yours).
Spindle: Square bar size is typically 8 mm on uPVC multipoint locks.
Door thickness: So you can choose the right M5 through-bolt length (often 60–75 mm, but match what you remove).
Measure
With the door open, measure:
PZ (spindle-to-key centre).
Screw-centres (top fixing to bottom fixing).
Backplate coverage (overall plate length) to ensure the new plate covers old marks.
Confirm handle type: lever/lever (same both sides) or lever/pad (offset).
Check whether your handle uses spring cassettes (most do) and note their orientation.
Remove
On the inside face, undo the two visible M5 machine screws (through-bolts) holding the backplates.
Withdraw the inside and outside handles together with the 8 mm spindle.
Leave the Euro cylinder and lock case in place (you don’t remove the cylinder for a straight handle swap).
Prepare
Compare the old and new spindles. If the new spindle is longer, you can trim it with a hacksaw so it protrudes evenly into each follower (aim for similar engagement on each side, typically 10–15 mm into each side of the lock follower).
If your new handles have spring cassettes, seat them in the backplates as shown by the manufacturer (this returns the lever to horizontal and prevents a “droopy” handle).
Align any gaskets supplied so they sit flat against the door skin.
Fit
Insert the spindle through the lock follower.
Offer up the outside handle first, then place the inside handle over the spindle, aligning both backplates with the original screw-centre holes.
Start both M5 through-bolts by hand to avoid cross-threading.
Secure
Tighten the two through-bolts evenly with a No.2 Phillips until the backplates are snug and don’t shift. Do not overtighten, as you can distort the door skin or bind the lock. Hand-tight plus a small nip is enough.
Test
With the door still open, operate the lever several times: the latch should spring in and out cleanly, and the lever should self-return to level.
Insert the key and make sure the multipoint throws and retracts smoothly.
Close the door and verify that the handle and key work with no rubbing.
Practical tips (to get it right the first time)
If your old handle drooped, the spring cassettes (in the handle, not the lock) were likely worn. New sprung handles fix this.
If you have a lever/pad set, confirm offset PZ (commonly 92/62 mm) before ordering; lever/lever sets are usually 92 mm PZ.
Keep the original bolts; sometimes they fit your door thickness better than the new ones.
If the handle binds after tightening, back the screws off ¼ turn. Binding usually means slight misalignment or overtightening.
What Should I Do If My Door Mechanism is Broken?
If your uPVC door handle mechanism is broken, inspect (check handle, spindle, and gearbox), remove (take off handle and spindle), assess (measure and identify faulty part), replace (fit new mechanism or gearbox), Reassemble (re-fit handle and spindle), and Test (ensure smooth latch and key operation).
Step by Step Guide
Tools you’ll need: No.2 Phillips screwdriver, tape measure, replacement handle or full gearbox if required, small hacksaw if spindle trimming is needed.
Inspect
Open the door so the latch is not under tension.
Gently lift and lower the handle.
If it feels loose, spins freely, or won’t spring back, note where the fault lies:
Handle only: worn spring cassettes.
Spindle: often a bent or stripped 8 mm square bar.
Gearbox (inside the multipoint lock): common if the latch will not retract when you press the lever.
Check the visible screws and escutcheons for cracks or movement.
Remove
From the inside face, undo the two M5 through-bolts holding the backplates.
Slide out the handle set and withdraw the spindle.
If the gearbox is faulty, also remove the Euro cylinder (loosen the single retaining screw on the door edge) and then remove the full lock strip.
Assess
Measure PZ (distance from spindle centre to key cylinder centre). Most uPVC doors use 92 mm, but check yours (72 mm and 92/62 mm are also common).
Measure the screw-centre distance so the new handle or gearbox aligns perfectly.
If replacing the gearbox, note the backset (distance from door edge to spindle centre), common sizes are 35 mm or 45 mm.
Compare these figures to the specifications of the replacement part before purchasing.
Replace
If only the handle is damaged, install a new sprung handle set with the same PZ and screw-centre measurements.
If the gearbox is broken:
Slide the new gearbox or full strip into the door edge.
Refit the Euro cylinder and tighten the retaining screw to hold it in place.
Re-assemble
Insert the spindle so it extends equally on both sides (about 10–15 mm each side). Trim with a hacksaw if it’s too long.
Position the outside handle, add the inside handle, and hand-start the M5 bolts.
Tighten them evenly until the backplates are snug but not overtightened.
Test
With the door still open, operate the handle to confirm the latch moves freely and the lever returns to level.
Lock and unlock the door with the key to ensure the multipoint mechanism engages and disengages smoothly.
Practical Tips
If the handle droops even after replacement, fit handles with integral spring cassettes to relieve stress on the gearbox.
Always work with the door open to avoid accidentally locking yourself out.
Keep the old screws, they may be the perfect length for your door thickness.
