Automotive Ac System Diagnosis

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Automotive ac system diagnosis.

With the engine off for at least 30 minutes read the low and high pressure gauges. Static pressure is the pressure with the system at rest compressor off for at least 30 mins. If the clutch is not engaging use a voltmeter to check for voltage getting to the compressor. As the internal parts disperse the metallic debris ends up throughout the entire system.

The ac system operation ac system service and the. Start your ac pressure readings diagnostic by measuring the system s static pressure. Attach to the hoses and gauge set to the high and low side ports of your ac system. Ac system diagnosis by symptom ac system diagnosis.

If the pressures do not change at all when the compressor engages then the compressor has failed or there is a problem with the metering device. If the readings are very high then you may have a problem with air trapped in the system or an airflow problem with the condenser. This condition has a few possible. In this situation you might need more than a condenser but also the tubes receiver dryer and compressor.

Typically this results from a defective or failing compressor that breaks apart. The typical complaint for an ac problem is the ac blows warm air.