Turn the temperature on high. Warmer air holds more moisture and can dry the fog faster. Turn the air conditioning on. This makes the fan act as a dehumidifier.
Recently you recommended using your AC and your defroster when defrosting the windows. The reason being the AC acts as a dehumidifier removing excess moisture from the air.
On most vehicles that have air conditioning, the A/C engages automatically when the defrost mode is selected to dehumidify the air. Drier air helps clear condensation from the inside of the windshield and front side windows faster.
The fastest way to defrost windows
An air conditioner works by removing moisture from the air and it can do that even better when the temperature is turned up. In that way, it's acting as a dehumidifier for your car rather than a cooler.
A popular method of quickly defrosting your car entails putting your heater on its highest setting, keeping the air conditioning on, turning recirculation off, and cracking your window a bit.
The first step to properly defrosting your windshield is getting into your vehicle and turning it on. Then, turning on your heating to the “defrost” setting, and waiting 5 minutes to 15 minutes for your windshield to warm up and begin to defrost.
Switch On the Fan
You'll want to turn on the fan-only setting. You must ensure the cool setting stays off, but the fan is on. This forces warm air over the evaporator coils, which may thaw the coils.
Defrost mode is when the outdoor unit gets too cold and sometimes the coil will be covered in ice. The unit cannot operate when there is ice on the coil, and it must defrost the ice before continuing to provide conditioned air. How can you tell if your air conditioner is in defrost mode?
When the system is in the defrost position the a/c compressor comes on and the air is drawn in and sent through the a/c evaporator to remove moisture from the air before it is sent through the heater core.
The entire system is reversed as the air conditioning is turned on, which causes the refrigerant to heat up and run through the outdoor coil to melt ice. The outdoor fan is stopped to prevent it from cooling the outside coil. The defrost will continue until the temperature of the outside coil reaches about 57 degrees.
You must be surprised to know this, but using a hairdryer can be the most accurate way to defrost your air conditioning unit. You can use a simple hairdryer or a blow dryer and run it after pointing towards the evaporator coils. However, you must ensure that you do not run the hairdryer at a higher temperature.
The first step to properly defrosting your windshield is getting into your vehicle and turning it on. Then, turning on your heating to the “defrost” setting, and waiting 5 minutes to 15 minutes for your windshield to warm up and begin to defrost.
For a quick fix: According to Road and Track, this is the fastest way to defog your windshield: First, turn the heat on its maximum setting because hot air can hold more moisture. Then, turn the AC on, which will pull the moisture from the air as it passes over the cooling coils.
If your car is parked outside in the cold weather, it'll take days for your system to thaw properly. Therefore, you should move your car to a sheltered location like a garage. You can make the thawing process faster by using a fan heater. The heat will help melt the fluid quicker.
Foods will defrost quite quickly at room temperature, but harmful bacteria could grow in food if it gets too warm while defrosting.
One question we are often asked is: , “Can I pour hot water on frozen air conditioner”? The answer is “Yes”. Pouring hot water will melt the ice faster and in turn, thaw your AC faster. In fact, the water does not need to be extremely hot, even warm water or running water will work to thaw the ice.
Air conditioners freeze when the airflow over the evaporator coils is insufficient. This can be caused by components like a dirty filter or condenser coil.
Whether you've confirmed for certain that you have frozen evaporator coils, or you just suspect it, you need to turn off your A/C. Then, your coils should be able to defrost, taking up to 24 hours to thaw out. You can also safely dry out the coils with a hair dryer.
AC coils freeze for a variety of reasons—the most common, though, is lack of airflow. Dirty air filters or problems with your ductwork can cause weak airflow, which hinders your equipment and its ability to keep coils warm and running properly. Temperatures drop and the AC coils freeze.
Once your AC is unfrozen go ahead and turn the AC back on and run the air normally, but keep a close eye on the unit for the next couple of days. More than likely, the dirty filter was the problem, but to be sure that there isn't another issue watch for any ice returning on the AC lines.