Air conditioning abnormal noise is not the habit of reviewing cars

Just entered the summer, the newspaper car hotline received a lot of owners of the consultation phone: With the increase in the frequency of the use of air conditioning, the car does not appear odor, that is, air conditioning can not be cooled, or use air conditioning, the car has become powerless ... ...

It seems that the air conditioning problem has become an epidemic of summer cars. The current car 114 consulted experts on the issue of this part of the owner.

Illness 1

Air conditioning refrigeration is not to force

"I haven't used car air conditioners for a long time. The weather is getting hotter every day. I found problems when I turned on the air conditioners after I got into the car. Although there are cold winds, only the air outlets can feel that the cooling effect is not obvious. Nothing unusual is happening.

Doctor diagnosis: refrigerant leakage prescription: add refrigerant + cleaning

After several months of decommissioning of some vehicle air conditioners, the refrigerant may have leaked light and need to be replenished.

While overhauling the plant, remember to remind repair personnel not to forget to clean the evaporator and the air-conditioning filter. Their clogging will affect the cooling effect. At the same time, it is also necessary to check whether the cooling effect of the air-conditioning is consistent with the factory's specifications. This is often the owner. Places that are easy to forget. In addition, it is best to give air conditioners a complete cleaning in the summer. There are many cleaning agents on the market for cleaning the air ducts of the air conditioners. Owners can buy their own cleaning products, or they can go to 4S shops or car decoration shops. Please handle them by hand.

Illness 2

It is difficult to start air-conditioned cars

"My car has a displacement of only 1.0L. I usually don't use air conditioners. Usually, the first two days are too hot. I turned the air conditioner on. After I think it's open, the car is harder to start than usual. It's impossible to make small displacements. Your car can't use air conditioning!"

Diagnosis: excessive engine load prescription: first open air conditioning outside the cycle

Summer parked in a car under the hot sun, the temperature inside the car may be as high as sixty to seventy degrees Celsius, then the car should be

The doors and windows are opened. You can use a fan to ventilate the air. Wait two or three minutes before the hot air is exhausted to start the car. Do not rush to close the window at this time, first open the air conditioning outside the cycle, when the temperature inside and outside the car is similar, then close the window, use the internal cycle. Although this has just begun to heat up, it avoids excessive load when the engine is started, and it also facilitates the air-conditioning compressor to quickly enter the best working condition.

Illness 3

Outlet only hot air

"Now that I'm air-conditioned, it's not only not cooling, but the air outlet is only hot air. I wanted to cool down the hot weather. The result is that it gets hotter and hotter. I don't know where to go."

Diagnosis: Evaporator damage prescription: air conditioning system cleaner

Experts pointed out that the air outlet is also very particular about the air outlet, according to the physical principles of air circulation, cold air will sink and hot air convection, so

When the air conditioner is turned on, the air outlet will be upward, so that the convection of hot and cold air will be formed in the vehicle and the cooling rate will be increased.

After removing the air conditioner filter, find the evaporator of the vehicle. The evaporator will condense the moisture in the air during the cooling process, and adhere to dust and dirt to breed bacteria. At this point, it is necessary to fill the "automobile air conditioning system cleaner" with the evaporator surface and the space where the air conditioning filter was originally located.

Illness 4

The air conditioner starts buzzing after it starts

"After I opened the air conditioner, the air conditioner did not start with a regular sound. There was a sound. Waiting for a moment, and then waiting for a moment to start again, the air conditioning at the air outlet of the air conditioner was normally delivered, and it was every few minutes. What's the situation?"

Diagnosis: Parts Damaged: Carpet Troubleshooting

Air conditioning abnormal sound is generally the abnormal sound of the air conditioning compressor, can be near the air conditioning compressor

I feel the sound. Such abnormal sound is generally caused by the air and moisture doped in the refrigerant composition. If the condition is still after the refrigerant is pumped, and the abnormal sound is located near the compressor, the internal mechanical structure of the compressor is more likely to be damaged; if the abnormal sound recurs after a period of time and is located inside the center console, the efficiency of the drying bottle is reduced. The chance is greater. After the investigations were conducted, the key to the problem was found.

Illness 5

Still smell after air conditioning cleaning

“I will clean the air conditioner myself before summer every summer. I fear that there will be odors. But after a long time after this year's cleaning, I discovered that the air conditioner still has a bad smell. The air conditioner is useless for a long time. Is it necessary to change?”

Diagnosis: There is a mistake with the car habits: Turn off the air conditioner before parking

The generation of air-conditioning odors is mostly due to the accumulation of condensed water in the air-conditioning tubes, resulting in a dark and moist environment, which makes the mold multiply. Photo-cleaning is a way to stop the symptoms, and it is more important to find problems in daily driving habits. Many people are used to turning off air conditioning when they are accustomed to parking. This causes condensate to accumulate in the pipeline. These condensate and dust in the air are attached to the surface of the evaporator and they can breed a large amount of bacteria. The air is blown out with the air. The entire interior air. It is best to turn off the air conditioning three or five minutes before reaching the destination, or turn off the air conditioning power at the destination, keep the fan idle, increase the air flow appropriately, and increase the temperature in the air conditioning pipeline before stopping to reduce the condensate production. Keep the air conditioning system dry. Experts also reminded that some people use air fresheners or perfumes to mask the smell of air conditioners. They are not only useless but harmful. To solve air odors, it is best to use professional equipment to thoroughly disinfect air conditioners and air ducts.