To unfreeze a car door lock, spray a lock de-icer or lock lubricant into the keyhole, wait a minute, then gently try your key. If the door itself is frozen shut, press firmly on it to crack the ice seal. Never pour hot water on the lock: it can refreeze quickly, and the sudden temperature change can damage your car.
How do I unfreeze a car door lock step by step?
- Try the other doors and the trunk or hatch. Often only one lock is frozen, usually the one facing the wind or snow. If you get in another way, start the car and run the heat to warm the doors from inside.
- Press on the door. If the key works but the door will not open, push firmly and then pull. A firm, gentle push can break the thin ice holding it shut. Do not yank the handle.
- Spray de-icer or lock lubricant into the lock. Use a product made for car locks or de-icing, and give it a minute to melt the ice.
- Insert the key gently. Wiggle it slowly. Do not force it, because a key can snap off inside a frozen lock.
- Dry the lock. Once the door is open, wipe away moisture so it does not freeze again.
What should I never do to a frozen car lock?
- Do not pour hot or boiling water. It melts the ice but refreezes fast and can damage paint, seals and glass.
- Do not use a flame. It is a fire risk and can damage the door and lock.
- Do not force the key or pry the handle. A broken key in the lock turns a minor problem into a locksmith job.
How do I stop my car door locks from freezing?
- Spray a lubricant made for locks into the keyhole at the start of winter and top it up during cold spells.
- Park in a garage or carport when you can, or use a car cover during storms.
- Wipe moisture off door seals and handles after washing the car in cold weather.
- Keep a small de-icer spray in your coat or bag, not inside the car, so you can reach it when the car is locked.
- For more winter tips, see AAA’s guide to opening a frozen car door and lock.
What if my key will not turn or breaks in the lock?
If the lock stays stuck after de-icer, or the key breaks, stop and call a professional. Our automotive locksmith services include lockout help and broken key extraction, and we can cut and program replacements through car key replacement. If the key goes in but will not turn the ignition, read why a car key will not turn in the ignition.
When should I call a locksmith?
Call if the key is stuck or broken, the lock still will not turn after de-icing, the remote and door locks both stop working, or you are locked out in the cold. Dispatch is open 24/7 at (406) 318-8199. We cover Downtown Billings, the Billings Heights and the South Side, and our emergency locksmith service handles lockouts day or night.
Frequently asked questions
Can I use hot water to unfreeze a car door lock?
No. Hot water can refreeze almost immediately, and the temperature change can damage the paint, seals and glass. Use a de-icer or lock lubricant instead.
Why does my car door lock freeze?
Moisture gets into the lock cylinder or around the door seals, and freezes in cold temperatures. Lubricating the lock and keeping seals dry helps prevent it.
Does roadside assistance help with a frozen car lock?
Often. Many roadside assistance plans include lockout help, so check your insurance or membership. If you cannot reach them, a locksmith can help.
Need a locksmith in Billings, MT?
Call (406) 318-8199 for 24/7 dispatch, or send a request online. See all of our locksmith services and service areas.