Denver guide
Frozen locks and dead fobs in a Denver winter
Over 2016 to 2025, Denver International Airport averaged 152 nights a year at or below 32°F, 20 days that stayed below freezing all day, and 6 nights under zero (NOAA). The cold rarely breaks a lock outright. It turns stray water to ice and saps batteries.
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Freezing nights per month at DIA (low of 32°F or colder)
The season is longer than people expect. October already averages about 8 freezing nights at DIA and April about 13, with January near 30. Freezing comes first, then snow; DIA's average is 48 inches a year.
Car door or lock frozen shut
- Skip the hot water. It freezes again within minutes and can crack a cold window.
- Check every door and the liftgate. Usually one of them opens.
- Hold the key in your fist for a minute, or use a de-icer spray made for locks.
- Lean into the door to crack the ice on the rubber seal, then pull.
- A key that won't turn shouldn't be forced. Snap it off in the cylinder and now it's a locksmith visit.
Fob dead on a cold morning
Coin-cell batteries lose output as they chill. Warm the fob in an inside pocket, then swap the battery. Most fobs carry a hidden metal key for the driver's door, and plenty of push-button cars will start with the fob pressed right against the start button. Fob programming.
House doors and keypads
- A deadbolt that drags in January but works fine in June is a door frame moving with the season. Moving the strike plate fixes it.
- Lubricate with a dry graphite or PTFE product for locks. Grease stiffens in the cold.
- Put fresh batteries in an outdoor keypad every fall.
What Denver callers ask about this
Can I use hand sanitizer on a frozen lock?
In a pinch, the alcohol in it can melt ice in a car lock. A proper lock de-icer does the job better.