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Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 21
The temperature at the air outlet of the air-conditioning compressor of the automobile is too high after running for ten minutes, and the air-conditioning is insufficient. The reason for the fault is that the expansion valve is opened too much, which makes the refrigerant in the evaporator too mu...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 20
4 The air-conditioning of the car air conditioner is insufficient, the temperature at the outlet is not low, and the reading on the high pressure gauge is high. low pressure gauge After investigation, the cause of the failure: the opening of the expansion valve is too small, the amount of the ref...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 19
Car Air Conditioning Failure Cases 1 After the car air conditioner has been refrigerated for a period of time, the air-conditioning is insufficient, and there are air bubbles in the glass hole of the liquid storage tank After investigation, the cause of the failure: due to the vibration of the ca...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 18
Pressure judgment failure If the high pressure gauge shows normal pressure and the low pressure gauge shows high pressure, it means that the auto ac evaporator pressure regulator, hot gas bypass valve, and intake throttle valve are faulty or adjusted; If the discharge air temperature is high, and...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 17
(2) Analysis and elimination of the shutdown of the air supply system 1) The fuse is blown or the switch is in poor contact. Check the fuse and replace it, and lightly wipe the switch contacts with fine sandpaper. 2) The winding of the blower motor is burned out, replace the winding. 3) The blowe...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 16
2 Failure analysis and troubleshooting procedures of general automobile air conditioning and heating systems Like the aforementioned braking system, the fault judgment procedure is to judge the specific part of the fault and eliminate the fault after listening to the driver’s warranty status, fol...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 15
2) Noise inside the system ① Too much refrigerant, noisy work, bubbles in the observation window, and high and low pressure gauge readings are too high. Drain the excess refrigerant until the pressure gauge reading drops to the standard value and the bubbles disappear. ②There is too little refrig...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 14
2) Analysis and elimination when the auto ac compressor is running intermittently ①The clutch slips, remove the clutch assembly, repair or replace. ②The clutch coil is loose or poorly grounded. Remove it for repair or replacement. ③ Switches and relays are closed and closed at times and out of co...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 13
2) Analysis and elimination of abnormal air flow ①The cold air motor is normal a. Obstacles in the suction port should be removed. b. The ac evaporator is frosted. Remove evaporator pipes and radiator fins. c. The filter in the reservoir is clogged. Clean or replace the filter. d. The air supply ...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 12
②When the auto ac compressor is not operating normally A. There is a malfunction in the compressor. Repair or replace. B. The car ac compressor belt is too loose or slippery, and the belt needs to be tightened. C. The electromagnetic clutch is malfunctioning a. The ac compressor clutch is slippin...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 11
(2) Insufficient air-conditioning supply 1) Analysis and elimination when the air volume is normal ①When the auto ac compressor is operating normally A. Low pressure on both high and low pressure sides a. There is an obstacle at the expansion valve, remove the obstacle. b. The opening of the expa...Read more -
Summary of Auto AC Maintenance and Common Faults and Case Analysis of Automobile Air Conditioning 10
2) Analysis and elimination when the air volume is normal and the auto ac compressor is rotating. ①The expansion valve is stuck and cannot be closed (ice blockage or dirty blockage), the reading of the low pressure gauge is too high, and the evaporator is flowing. Clean the fine mesh or replace t...Read more
