How To Defrost A Car? [Quick & Easy Guide]

Running your automobile solely for frosty and fogged window glass is not an enjoyable way to start the day. Hot air is hotter than cold air, therefore moisture easily suspended in warmer air will be released when its temperatures drop, leading to condensation – all these small water droplets will fog up your windshield.

Lucky to you, we have a few suggestions on how to combat fog and freezing and quickly get you back on the road. Learn how to defrost a car in an easy manner. It is an important skill as it is directly related to your safety in the vehicle.

What Are The Reasons For A Car Window To Fog Up?

The cause of foggy windows is the temperature and humidity content of the air. On a chilly day, any moisture within your car—from passengers who exhale, snow on your boots, etc. When the airstrikes adjacent to the windows below a specific temperature, which is called the dew point, it transforms into condensation.

The condensation causes the windows of your car to look foggy. On a hot, humid day, it happens when your windshield is cooled by your AC system that the muggy air outside of your automobile reaches its point of dew.

Whether the fog is within or outside your windows, it’s potentially harmful, therefore, knowing how to ensure that your windows are clear, regardless of the weather.

How To Defrost A Car In A Simple Manner?

It can be tempting to walk out on those very chilly days, start your vehicle, let it go a little while, and only get on the road once the engine and cabin are warmed up. You need to create optimal surroundings to help remove humidity in order to defog the quickest. Here are the steps-

1. Warm Up The Engine

The core of how most cabin heating function starts with a cooling mechanism within the motor. Some of the heated coolants turn the engine into the heater core via a water valve. This is a tiny radiator variant with coolants to dissipate the warmth and cooling fins. If the fan is on, the air is heated into the cabin via a blower motor. 

2. Turn On The Car AC

It may sound crazy if you are learning how to defrost a car process, but it actually enables the configuration of your car’s A/C system to dry the air faster with the use of spindles in your A/C system in the cab. Maintain the HOT temperature. In order to manage the temperature, small “mix doors” are opened or closed to the heat or cold air in the booth.

3. Select Fresh Air Option

You must also have fresh air in the car. The winter air is cold and, because it has little humidity, it is dry. Saturated air will increase the moisture-absorbing ability inside the vehicle.

The warm air from the defroster helps to evaporate moisture near the windscreen. Fresh air option will prevent moisture build-up inside the vehicle.

4. Defrost Outside Window

During the above defogging procedure, freeze your windows. This technique should NEVER (EVER) include hot water as a whole different step. Defrosting takes a little preplanning swiftly but saves a snow-capped headache mountain at a later time. If you can’t bear scrapping, add 2/3 cup Isopropyl or alcohol or 1/3 cup of water and put them in a spray bottle.

This solution won’t freeze (alcohol frozen at 138 degrees below freezing) and is easy to store in your car so that you may spray windshield ice wherever you are.

5. Hvac Vent Position

Always select the defrost position to clear the windows. The heating and air conditioning fan and blower motors also circulate air to freeze the windows through these vents. Turn your heating to “defrost” and wait for 5 to 15 minutes for the windshield to warm up and start freezing.

How Dangerous It Is To Drive With Fogged Up Windows?

“If you can’t see you don’t drive,” is the main guideline for low visibility through the windshield. Smoke and fog are regular occurrences. In most circumstances, a driver can only wait and delay his journey.

A foggy windshield is one of the hardest challenges for drivers to deal with. When the external temperature becomes frigid and the interior of your car suddenly becomes warm, your windows fog up. This might take place in the winter and early spring and late autumn as well.

Other Methods To Prevent Car Windows Fogging

If you want to help with the above ways and prevent fogging in the future, there are some useful ideas you can apply with things that are possibly present in the immediate vicinity of your home. A dehumidifier bag or a number of them is one of the first things you can utilize and put them around your dash near the windshield.

These pouches are filled with balls of silica, which absorb atmospheric humidity and can be a good answer to how to defrost a car. You can stuff a handful of silica balls into a sock and place them around your car if you cannot find a dehumidifier bag.

General Maintenance For Window Glasses Of A Vehicle

The windshield conditions affect more than one windscreen in the car. The wiper consists of two components in general: an interior metal framework and an outer rubber cover. The windshield exposes the metal structure when the rubber coating wears off.

That implies, that the metal body scraps against the windshield every time you run the wipers. It could create major scratches on the glass. The wiper blade is decaying with time due to wear, debris, moisture, and sunshine, and you need to replace it for protection from the windshield at least once a year.


Knowing how to defrost a car is a very important skill set that you must know. A poor visibility situation can quickly become a life and death situation. It is important that you maintained the proper visibility of the car. If you still have any doubts, then comment down below.

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