Index AC System Turning On and Off Rapidly Unable to Cool Car Unable to Start Monitor Engine Light Particle Buildup Mass Air Flow Airflow Sensor Symptoms of mass and low sides of the air conditioning system. Monitors the refrigerant pressure on the respective side of the system. There is a pressure switch on the high side and one on the low side, and both serve to monitor the system for any pressure failures that can damage the compressor. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essayWhen the pressure is too low, the compressor is at risk of damage due to running on too little oil. When it is too high, the compressor risks overheating and damage. Depending on which side of the system the sensor is mounted on, when the pressure rises too high or drops too low, the switch will turn off the compressor to prevent damage. Since pressure switches serve to protect the compressor and the rest of the system from damage, they play an important role in the proper functioning and life of an AC system, so they should be replaced if they cause problems. When they start to fail, they usually show some symptoms that alert the driver to a potential problem. Quickly turning your AC system on and off Repeatedly turning your AC system on and off is part of the normal operation of an AC system. There are times when the air conditioning is turned off, for example when the correct temperature has been reached and the pressure is adequate. However, if the system turns on and off very frequently or more quickly than normal, it could be a sign that the cycle switch is not working properly. Unable to Cool Your CarIf one of your AC pressure switches fails, your system will have a difficult time maintaining the pressure needed to function properly. If the pressure is incorrect, the AC system will not be able to produce the cold air needed to adequately cool the cabin. You may notice that the cabin takes longer than usual to reach the correct temperature, or it may not even reach the correct temperature. Unable to Start Since pressure switches control the on/off function of the AC compressor, a failure of the switch can prevent the AC compressor from operating altogether. The compressor is what pumps the refrigerant through the entire system. If it doesn't work, the system cannot function and will not be able to produce cold air. Since AC pressure switches play a critical role in ensuring the proper functioning and service life of your AC system, any problems with them should be addressed immediately to ensure the integrity of the system. If you suspect one of your AC breakers is faulty or failing, have it diagnosed by a professional technician from YourMechanic. If necessary, they will be able to replace the AC pressure switch so you can ensure your system continues to function properly. Monitor Engine Light The most reliable symptom of the mass air flow sensor is the illumination of the engine inspection light on the material panel. Several types of problems can cause the light to come on, so you should have your car's computer checked to see if the light is associated with the mass airflow sensor. Particle Accumulation In some cases the mass airflow will not work well due to the dirty reason. Even though the air that is sent through the mass airflow is filtered, tiny particles manage to penetrate and settle on the sensor. In most cases, this deposition will not be.