How to Fix a Frozen House Door Lock

In winter, nothing’s more frustrating than a frozen door lock keeping you from getting inside. Instead of forcing the key, try fixing your frozen door lock with the heated-key method, rubbing alcohol, or a commercial de-icing spray. 

How to Unfreeze a Door Lock with Rubbing Alcohol or Hand Sanitizer 

One of the easiest ways to unfreeze a lock is to use isopropyl alcohol or hand sanitizer. This works because ethanol and isopropanol lower water's freezing point, helping melt ice. A few methods include: 

• Using a spray bottle filled with rubbing alcohol and spritzing it onto the keyhole. 

• Squeezing a little hand sanitizer onto your key and inserting it into the lock. 

With the spray bottle method, make sure you use pure rubbing alcohol rather than diluting it with water. Wait a few seconds to allow the rubbing alcohol to soak in and melt the ice. Keep in mind that pure rubbing alcohol is a solvent, so you want to avoid letting it on the surface of your lock or door for too long. It’s best to wipe down the surface to remove any rubbing alcohol that might be sitting on the surface. 

With the hand sanitizer method, you may need to gently wiggle the key to get it into the lock. Be careful not to force it, as this can cause damage. Once the key is in, let it sit for up to a minute before trying to turn the key. This gives the alcohol in the hand sanitizer time to melt the ice. To prevent gumming up your lock, avoid hand sanitizers that are heavily fragranced or have agents that make them thicker than regular hand sanitizer. 

The Heated-Key Method

Another easy way to fix a frozen house door lock is to thaw the ice in the locking mechanism with a heated key. Because this method involves handling a heated metal key, be sure to wear gloves to protect your hands.

There are a variety of ways to heat your key, and what method you choose will depend on your situation and the materials you have readily available. Here are some simple ways you can try to heat up your key:

• Turn your car heat on high and place the key near the vent to warm it.

• Use a blow dryer or heat gun. 

• If you have no tools available, warm the key using your own body heat by cupping it in your hands or holding it in a pocket by your torso. 

By heating your key, you should be able to turn it easily within the lock, as the heat from the key should be enough to thaw the minimal ice that’s formed within the mechanism. 

If you have a 100% metal house key and the other methods for warming it are unsuccessful, you can try warming it with a lighter or match for a few seconds. Don’t use an electric cigarette lighter from your car, as it can be extremely hot and potentially damage your key. Be sure to carefully wipe any carbon soot from the key with a clean cloth before using it in the lock. Any particles deposited inside the keyway will clog the internal pin tumblers over time. 

Do not use hot water to warm your key or the lock mechanism itself. Even if you dry the key, it can still transfer some moisture to your lock, increasing the chance of it refreezing. 

How to Unlock a Frozen Door with De-Icer Solutions 

If rubbing alcohol or a heated key doesn’t work, or if your door lock freezes often, try a de-icer, which uses a chemical reaction to thaw the lock instead. Since you probably don’t have a can of commercial de-icer solution on hand, this isn’t always a quick fix. However, it can be very helpful to keep a can on hand in your car, purse, or bag if you start having regular issues. Commercial lock de-icers are available at auto parts stores, gas stations, hardware stores, or online. 

Using commercial de-icer is very similar to the method for using rubbing alcohol for a frozen keyhole. These cans come with a straw attachment that goes directly into the keyway instead of spraying the general area. Like rubbing alcohol, you want to remove any drips or overspray to protect your hardware. Be sure to use a lock lubricant powder after using a de-icer solution. 

Why Your Door Locks Freeze

Getting your house unlocked quickly is the main priority, but it’s also important to understand why locks freeze in the first place so you can prevent future issues. 

Your house door lock takes more of a beating than you may realize. In most cases, door locks are constantly exposed to the elements and inclement weather conditions, and because the keyhole remains open, it can easily accumulate dirt and debris. 

In addition, most of us carry our house key on a keyring within our pockets, bags, or purses, and throughout time, your keys can transfer additional debris to the locking mechanism itself. During the bitterly cold winter months, that accumulation of debris and grime within the lock may contain moisture that can freeze, causing your lock to malfunction.

How to Avoid a Frozen House Door Lock

If your door lock continues to freeze, you’ll likely need to clean your lock, as there is too much dirt within the mechanism that’s retaining moisture. Clear out loose dirt and debris using a canister of compressed air or an oil-free electronics cleaner spray. Avoid using cotton swabs or damp rags, which trap cotton fibers and moisture inside the keyway. While cleaning the lock will likely be enough to get you through the winter season, routinely lubricating the locking mechanism with a dry lubricant can help you avoid having your lock freeze in the future. 

Once you’ve cleaned the lock, spray a graphite lubricant into the locking mechanism. Insert and turn your key a couple of times to help further distribute the lubricant around the lock. By removing the built-up debris and lubricating the mechanism, you reduce the moisture-containing debris that freezes and causes the lock to malfunction in colder temperatures.

Tired of Waiting for Your Locks to Thaw?

If the hassle of frozen locks this winter has you feeling frustrated, it may be time for you to invest in a keyless door lock that eliminates the need for a traditional lock-and-key mechanism to unlock your door, while simultaneously boosting the security of your home.

At GoKeyless, we offer an extensive range ofkeyless lock options andsmart locksthat use a touchpad combination to unlock your door. For more information or to switch to a worry-free keyless door lock,contact the experts at GoKeyless!