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

I had a call-out to Pitshanger Lane in early December last year. Bloke couldn't get his front door open, standing in the rain with two bags of shopping. The lock hadn't failed suddenly. It had been struggling since September. The key had been getting stiffer, the door harder to pull shut, and he'd ignored both. One cold snap finished the gearbox off.

That job cost him around £180 including a new multipoint mechanism. Ten minutes in October would have cost him nothing.

Here's the check. Work through it on a dry afternoon before the temperature drops.

1. Lubricate the cylinder properly

WD-40 is not a lubricant. I know it's under the sink, I know it's tempting. WD-40 is a water displacer. It strips existing grease, dries out, and leaves the cylinder worse off than before.

Use a dry PTFE spray or a graphite spray. Squirt it into the keyhole, insert the key, work it in and out a dozen times. Wipe the key clean after. That's it. Do not use oil, 3-in-1, or anything that leaves a wet residue. Wet residue attracts grit, grit wrecks pins.

If you've got a Ultion, Avocet ABS, or Mul-T-Lock cylinder, the manufacturer guidance is the same: dry lube only.

2. Watch for the stiff-key warning

A key that's slightly harder to turn in November than it was in June is telling you something. Either the cylinder is dry and dirty, or the door is dropping on its hinges and putting lateral pressure on the lock cam. Both are fixable now. Neither is fixable cheaply once the mechanism shears.

Test it: insert the key and try to turn it without lifting or pushing the door. If you have to jiggle the handle or shoulder the door to get the key to turn, the problem isn't the lock. It's the alignment.

3. Check the hinges

Grab the door by the handle side and lift gently. Any movement at all means the hinges are loose. On a timber door, tighten the screws. If the screws spin freely, the thread is gone. Pack the holes with wooden matchsticks and wood glue, let it dry, then re-drive the screws.

uPVC doors in West Ealing and Hanwell are almost always hanging on adjustable Euro hinges. There's a hex key adjustment on most of them, usually 5mm. A quarter-turn upward on the bottom hinge sorts a dropping door more often than not. If you're not confident, leave it to someone who is.

Loose hinges in autumn become seized hinges in January. Cold contracts metal and makes every tolerance tighter.

4. Check the weatherseal around the frame

Run your fingers around the full perimeter of the door when it's closed. Feel for cold air. Look for weatherseal that's compressed flat, split, or pulling away from the frame.

A failing weatherseal isn't just a draught problem. On multipoint doors common in W5 and W13, it lets damp into the frame. Damp in the frame warps it. A warped frame puts the keeps out of alignment. The bolts stop engaging fully, and now your BS8621 lock is doing nothing because the bolts aren't actually shooting home.

Replacement foam or brush weatherseal is a few pounds from any hardware shop. It's a five-minute job. Do it.

5. Test every locking point

On a multipoint lock, lift the handle fully and turn the key. You should feel every bolt and hook engage with resistance. Open the door and look at the keeps on the frame. Each one should show grease or wear marks from the bolt hitting it squarely. If a keep is clean, that bolt isn't reaching it.

While you're there, spray a small amount of petroleum jelly or the same PTFE spray onto each keep. Don't neglect the top and bottom bolts. They're the ones that seize first because nobody ever thinks about them.

6. Check the door closer (if you have one)

This applies mainly to communal entrances in Ealing Broadway flats and small commercial premises around Park Royal or Brentford. A door closer that's sluggish in October will fail to pull the door fully shut in the cold. The hydraulic fluid thickens. Adjust the closing speed now, before the first frost does it for you.

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None of this takes specialist knowledge. It takes a PTFE spray, a hex key, and twenty minutes of actual attention. Most lock call-outs in winter are the result of a door that was already struggling.

If you work through this and something still feels wrong, give Locks Local a call. We cover Ealing and the West London postcodes from W3 to UB6 and NW10, and we're usually with you in under half an hour. We'll tell you what's wrong and what it'll cost before we touch anything.