The weather is hot in summer, especially after the vehicles are exposed to the sun, we often feel that the effect of using air conditioners is not good, and that the oncoming wind blown by air conditioners is not cool or not cool enough. How to judge whether the air conditioning wind is cold enough? You can do it without going to a 4S shop or a repair shop to find a technician.

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For some vehicles with high air-conditioning configuration, maintenance personnel use a diagnostic instrument to enter the air-conditioning system and read the temperature of the air-conditioning evaporation box and air outlet. The temperature of evaporation box is about 0℃, and the outlet temperature is generally below 10℃.

Use infrared thermometer to measure the temperature of the air outlet of air conditioner or the surface of evaporation box.

Touch air conditioner refrigerant low pressure pipe

First, introduce the location of the low-pressure air conditioning pipe connecting the air conditioning evaporation box and the air conditioning compressor (as shown below). If you know the location of the evaporator or compressor, you will find the low-pressure air conditioning pipe.

The evaporation box is under the dashboard of the cab, and some medium, large and high-profile cars will also be equipped with evaporation boxes in the back row. Air-conditioning refrigerant evaporates from liquid to gas in the evaporation box, and the temperature of the evaporation box drops to about 0 degrees.

The temperature of the low-pressure pipeline of the air conditioner connected with it will also be reduced to the temperature close to that of the evaporation box, and the low-pressure pipeline of the air conditioner is connected with the evaporation box in the engine compartment. The air-conditioning compressor is also located in the engine compartment and is driven by the engine belt. Coarse and low pressure pipe on compressor.