Car AC Compressor Failure Diagnosis Automotive A/C Clutch, Electrical & Mechanical Faults Explained

Описание: In this video you will learn how to detect the main automotive air conditioning compressor failures, using professional diagnostic techniques applied in real vehicle A/C systems.

We cover AC compressor clutch problems, electrical failures, mechanical faults, and refrigerant pressure diagnosis, explaining in detail how each condition affects the performance of the car air conditioning system.

📌 Topics covered in this video:

How to diagnose automotive AC compressor clutch failures

Symptoms of a worn or misaligned AC compressor clutch

How electrical faults prevent compressor engagement

Blown fuses

Faulty relays

Short circuits

Open or shorted clutch coil

How a failed pressure switch (pressostat) can block power to the compressor

Step-by-step electrical testing with a multimeter

Resistance measurement of the clutch coil

Continuity testing of fuses and relays

Safe battery jumper test to verify clutch operation

🔧 Mechanical compressor diagnosis:

How to check high-pressure and low-pressure AC lines

Correct temperature behavior of AC pipes

How to identify a compressor that is not compressing

Manifold gauge testing explained

Normal automotive AC pressures

Low side around 35 PSI

High side around 150 PSI

How to identify refrigerant leaks based on pressure readings

⚙️ POA valve failure explained:

What the POA valve (flow regulating valve) is

How POA valve failure affects cooling performance

Typical pressure symptoms

High low-side pressure

Near-normal high-side pressure

This video is ideal for:
✔ Automotive AC technicians
✔ Mechanics and workshop professionals
✔ Automotive students
✔ DIY car AC diagnostics
✔ Anyone troubleshooting car air conditioning compressor problems

If you want to avoid unnecessary compressor replacements, improve your automotive AC diagnostic skills, and understand how electrical and mechanical faults affect AC performance, this video will give you clear and practical knowledge.

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