6 reasons why car air conditioners “die” in hot weather
(Baonghean.vn) - Summer is coming, the air conditioning system in cars is used more often, so there are often unusual problems that make the people sitting inside feel uncomfortable in the hot air... Below are common failures that you should pay attention to in order to recognize and find a way to fix.
1. Car radiator is covered with dirt
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When the air conditioner condenser is covered with too much dirt, it will not be able to cool down. This is considered the cause of the car's air conditioner not cooling.
How to fix:If it is too dirty, clean it immediately. However, be careful not to spray water too hard, because it can dent the aluminum radiator fins.
2. Car air conditioner is frozen
Similar to the condenser, the evaporator is covered with too much dust, creating a thick layer, so the air cannot blow through, this case leads to the evaporator freezing. At first, the car is very cold, after a while it will run weaker and then stop completely...
How to fix:At this time, regular cleaning and maintenance is needed... If the condenser is expired, it should be replaced with a new one, this is the best choice.
3. Clogged air filter
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Turn on the car air conditioner but it is not cold or very weak - the cause may be due to the air filter of the air conditioning system being clogged. During the use of the car, too much dust sticks to the filter, forming a thick layer causing the air to be trapped in the cooling system and not be able to circulate outside.
How to fix:Cleaning the filter is the only solution; depending on the design, some cars only need to open the glove box and pry off the air filter to clean the dust that sticks to it. But some cars have to remove the glove box cover to clean the filter. Or you can use a pressure gun to clean the dust on the filter. Note: the filter needs to be cleaned monthly if the car often goes to dusty places.
4. Temperature sensor problem
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The cause of the car's air conditioner not being cool may be due to the temperature sensor (temperature control relay) being damaged or incorrectly adjusted, affecting the cooling system.
How to fix:If the temperature sensor is adjusted to the wrong temperature level, it can be readjusted; if it is completely damaged, the vehicle should be taken to a service center for help from technicians. Usually for cars it is usually 6 - 9 degrees, and for trucks it is 8 - 12 degrees.
5. Air conditioner fan problem
In addition to the cooling function, the car air conditioner also has a wind blowing mode. When switching to this mode, if after a while the air conditioner does not work, it may be due to the following reasons: the circuit is broken due to long-term use; the contactor coil is damaged, causing the fan to not run; the fan motor may be short-circuited or have a shell contact.
How to fix:Check all electrical circuits and electrical connections of the air conditioner with a meter for accuracy; Check all capacitors inside and outside the air conditioner's connection lines with a meter; Check the circuits and contacts of the air conditioner; Check the insulation of the air conditioner with a meter.
6. Car air conditioner is "dead"
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Undercharging or overcharging gas are both causes of the air conditioning system being paralyzed. When the air conditioner is low on gas, it will not be cold enough. In case of a large gas leak, the pressure will drop below normal, at this time the low pressure switch will cut off the circuit and prevent the compressor from operating.
When overcharging gas makes the machine heavier, engine power decreases and fuel consumption increases. The symptoms of overcharging gas are that the compressor turns on and off continuously, the machine runs slower and more sluggish than normal.
How to fix:Fixing a “dead” car air conditioner is quite complicated and must be done by skilled technicians. Therefore, car owners have no choice but to bring their cars to reputable car maintenance and care centers for assistance.
