Autumn Lock Maintenance Check | Ten Minutes That Could Save Your Lock This Winter

Last November I got three call-outs in one week from houses on the same stretch of Speldhurst Road. Different doors, same story. Gearboxes had been grinding quietly all summer, the first cold snap tightened everything up, and suddenly nobody could lock the front door before bed. All three could have been avoided. None of them were.

Autumn is the window. Spend ten minutes now and you're fine. Wait until January and you're calling me at half seven on a freezing Tuesday morning.

Here's what to actually check.

The Stiff-Key Warning Sign

If your key turns but feels like it's dragging, don't ignore it. That resistance is friction inside the cylinder. In warm weather your lock works anyway. Drop the temperature, add a bit of damp, and that marginal cylinder becomes a locked-out situation.

Fix it now: get a dry PTFE lubricant spray (WD-40's specialist PTFE product is fine, or GT85). Do not use the standard WD-40 in the blue tin. It's a water displacer, not a lubricant. Long-term it attracts dirt and makes cylinders worse. Squirt a small amount of PTFE into the keyway, insert the key, work it ten times. That's it.

If the drag doesn't ease, the cylinder may be at end of life. A decent replacement, an Avocet ABS or an Ultion, TS007 3-star rated, costs between £35 and £65 on the cylinder alone. I'll fit one in under twenty minutes.

Multipoint Gearbox: The Big One

This is what bites people. The gearbox is the mechanism inside a uPVC door that throws all the locking points when you lift the handle. They wear out. They don't announce it loudly. They just get stiffer over two or three winters until one day the handle won't lift at all.

Stand at your door and lift the handle. It should move cleanly with light pressure. If you're using your body weight, or if it creaks, the gearbox needs attention. GU, Fuhr, Maco, Mila, Winkhaus: most have a similar lifespan of eight to twelve years with regular use. Check when your door was fitted. If it's been a decade and you've never thought about the lock mechanism, you're due.

Lubrication won't save a worn gearbox. But on a mechanism that's still sound, a light spray of PTFE along the shoot bolts and locking points every autumn extends its life considerably.

Weatherseal Check

This one gets missed because it feels like a draughtproofing job, not a security job. It's both.

Run your hand around the door frame when the door's closed. Feel for airflow, or daylight if you do it at night with a torch outside. A weatherseal that's shrunk or split doesn't just let cold air in. It lets the door flex slightly more in the frame. That movement puts extra strain on the locking points every time someone pushes or pulls the door. Over winter that adds up.

Replacement weatherseal is cheap and it's a DIY job if you're handy. If the door's also sitting badly in the frame, that's a different conversation.

Hinge Check

Shut your door and look at the gap between door and frame all the way round. It should be even. If the gap's wider at the top than the bottom on the handle side, the hinges have dropped.

Dropped hinges mean the door pulls the multipoint locking points out of alignment. The keeps, the metal plates set into the frame that the shoot bolts and rollers engage with, stop lining up properly. The lock technically works but it's not fully engaged. A locked door that's visually locked but mechanically not is no use to anyone.

Most uPVC and composite door hinges have adjustment screws. A 5mm hex key and five minutes is usually enough to lift the door back to true. If the hinges are cracked or the plastic housing is broken, they need replacing before winter, not after.

The Actual Ten-Minute Routine

• Lift the door handle. Should be light. Note any creaking or resistance.
• Turn the key both ways. Drag means the cylinder needs PTFE or replacement.
• Spray PTFE lubricant into the keyway and along the shoot bolts. Work the mechanism.
• Check hinge gap top to bottom on the handle side. Even gap means aligned door.
• Run your hand along the weatherseal on all four sides. Split or missing sections need replacing.
• Open and close the door a few times. It should swing freely without lifting or dropping.
• Lock and unlock from inside and outside. Both directions should feel the same.

That's it. Twenty minutes if you're methodical. You'll know by the end whether anything needs attention.

Locks Local covers Southborough and all the TN postcodes, Tunbridge Wells, Tonbridge, Bidborough, Paddock Wood, Pembury, Hildenborough, Langton Green. Most jobs in TN4 and around High Brooms I can reach in under thirty minutes. Pricing's given honestly on the call, no surprises when I arrive. If you've done this check and something's flagged, give me a ring before winter proper sets in.