Why Door Locks Stick in a Dry Colorado Winter

Author : Choice City Locksmith | Published On : 18 Oct 2026

Colorado's dry air, big temperature swings and winter cold are hard on doors. Wood shrinks and swells, frames settle, and a lock that worked perfectly in summer can start to stick in January. Here is how to tell what is going on and what to do about it.

Is it the lock or the door?

Open the door and try the key or thumb turn. If the bolt moves freely with the door open but sticks with it closed, the lock is fine and the bolt is rubbing on the strike plate. That is an alignment issue, not a broken lock.

Fixing alignment

• Tighten the hinge screws. A sagging door is a common cause, and a longer screw in the top hinge can pull it back up.
• Look for scuff marks on the strike plate to see where the bolt is hitting.
• Adjust or slightly enlarge the strike opening so the bolt slides in cleanly.

When the lock itself is the problem

If the key is hard to turn even with the door open, the cylinder may be dirty or worn. A dry graphite or PTFE lubricant made for locks often helps. Avoid oily sprays, which attract dust. If the key only works at certain angles, the key or the pins are worn.

Frozen locks

Moisture in a lock can freeze overnight. Warm the key, not the lock, and use a lock de-icer rather than hot water, which refreezes deeper inside.

Do not force it

Forcing a stuck key is how keys snap. If it will not turn, stop and fix the cause.

Choice City Locksmith handles door lock repair in Fort Collins, from misaligned strikes to worn cylinders, across Northern Colorado. Phone (970) 803-1100.