Why doesn’t the air conditioner cool my car and the wind blows hot?
Why does the car air conditioner heat up and not cool down?
According to the online economy report; Unfortunately, many drivers mistakenly think that using an air conditioner causes double pressure on the car engine, but unfortunately, they do not think that enduring the harsh conditions without an air conditioner in this excruciating heat puts more pressure on their soul and body! Sometimes, by delaying the service and taking care of the car cooler, the car cooler may not work well; In this article, we will examine the common reasons for the car cooler not cooling.
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Do not drive gas board!
One of the most important reasons for the heating of the air conditioner in the car is driving a gas board. Most cars turn off the air conditioner when the gas pedal is fully pressed! Usually, many drivers prefer to use lighter gears due to the less acceleration and power of the car, and in this situation, the driver has to press his foot on the gas pedal all the way; Therefore, moving in throttle mode is inevitable in this type of driving.
Please be aware of dirt in the condenser
One of the parts of the car cooling system is the condenser or cooler radiator. Cooler gas is compressed and liquefied after passing through the compressor. Since the cooler radiator is located in front of the car and the water radiator, dirt particles, insects, pieces of plants, etc. They cause dirt and clogging of the external networks of the cooler radiator. The dirtyness of the condenser of the car cooler causes it to heat up and cause problems in the operation of the cooler and increase the water ampere of the car in traffic and at low speeds. Therefore, it is better to clean the condenser of your car cooler every year with the beginning of the summer season.
Check the car air conditioner valves
The failure or non-adjustment of the cold control valves of the car air conditioner system causes hot and cold air to mix and thus reduce the air conditioner’s coldness in the summer. In most of today’s cars, the cooler valves are controlled electronically. The electronic steering is transferred to a small gearbox motor and the valves are opened and closed. Although the electronic controllers work very accurately, they sometimes have problems and affect the efficiency of the cooler.
On the other hand, most of the valves are sealed by foam, cloud or rubber washers. These materials lose their properties after a few years and cannot seal the valves well, thus causing leakage of hot air in summer and cold air in winter. In order to solve the problem of not adjusting the air conditioner valves, you should refer to people who are experts in the field of car air conditioner service.
Don’t forget the evaporator inside the room
Another reason for cooling the car cooler is the dirty evaporator. Due to the constant passage of air through the evaporator in summer and winter, it usually gets a layer of dirt on it. In addition to reducing the coldness of the car cooler, getting this part dirty also causes an unpleasant smell. Due to the humidity created in the dusty environment, the evaporator can be a place for the accumulation of bacteria, microbes and fungi, which may endanger human health. Of course, cleaning the evaporator directly is somewhat difficult due to its location; But there is a relatively simple way to clean the evaporator of all cars, which requires a lot of patience;
To do this, first turn on the car’s air conditioner and set the fan’s intensity to the lowest value (the air intake valve must be on the rotating mode inside the car). Then boil about eight to ten liters of water in a container and put it in front of the student’s seat under the dashboard. Add a glass of industrial alcohol (about half a liter) to the water and let the car cooler stay on for about forty minutes until the water warms up. Car doors must be closed at all times. By looking at the water outlet pipe (drain) of the cooler under the room, you can see the dirty water coming out of the evaporator compartment, and by placing a container under it, you can continue this until the outlet water is clean and smooth.
Do not forget the thermostat inside the room
Almost all cars’ cooler thermostats are inside the room. Cars with automatic air conditioning systems usually have two thermostats in the room, one on the evaporator and the other behind a part of the dashboard. Cooler thermostat turns off the compressor after the evaporator temperature reaches close to zero degrees. This mechanism is designed to prevent the evaporator from freezing; Because if the evaporator freezes, the volume of air coming out of the valves will decrease drastically and the temperature will rise. Failure of the thermostat may cause the compressor to work excessively and the evaporator to freeze, or the compressor to stop completely or early. In case of early disconnection, the outlet air of the cooler will not cool enough and usually the compressor will be connected and disconnected in a short period of time.
Do not neglect the condenser fan
In order to cool the condenser when the air conditioner is on, one or more fans are provided that are used when the air conditioner is turned on. The rotation of the fan causes the air to pass and cool the hot compressed gas inside the condenser; The gas inside the condenser is very compressed and turns into a liquid by losing heat, and after passing through the expansion and turning back into a gas, it creates cold. Failure and failure of the condenser fan causes many problems that cause the air cooler to heat up.
Not cooling the compressed gas in the condenser causes the gas pressure to rise in the high-pressure part and the cooler to shut down; Because there is a gas pressure sensor in the high-pressure circuit of the cooler, which cuts off the compressor when the gas pressure is too low or too high to prevent the compressor from breaking down or bursting the cooler pipes. In cars that have two or more fans, the failure of one of the fans or the fan not working at high speed after the car engine warms up, causes the air cooler to heat up. Usually, car air conditioners work very well in the cooler hours of the day, but they have problems during traffic and high heat. One of the signs of problems in the car fan is the overheating of the engine when the car air conditioner is on in traffic and uphill.
Check the gas cartridge of the cooler
Cooler gas pressure sensor, which repairmen usually call cooler cartridge, is one of the important parts of car cooler. The cooler cartridge is a multi-mode pressure gauge microswitch that is located in the high pressure path of the cooler. If the gas pressure inside the system is lower than a certain limit, the gas pressure sensor does not allow the compressor of the cooler to turn on, and if the pressure is too high, it will stop the compressor. Another task of the air conditioner cartridge is to turn on the high speed of the condenser fan. Damage to the gas pressure sensor causes many problems. In some cases, as soon as the gas pressure rises to the normal level, the pressure sensor cuts off the compressor and reconnects when the pressure drops; This usually happens while driving with the engine revving high, and one of its symptoms is the momentary cooling and heating of the air conditioner.