Mercedes Break In Refrigerant Compressor

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AC Compressor Break-In Procedure

What it does

• Performs controlled run-in of a new AC compressor
• Distributes oil evenly inside the compressor
• Protects the compressor from premature wear

When it is required

• After replacing the AC compressor
• After opening the refrigerant system
• After major AC system repairs

Conditions that must be met

• AC system fully evacuated and recharged
• Correct type and amount of refrigerant and oil
• No leaks in the system
• Engine running
• Stable battery voltage

What happens during the procedure

• AC compressor is driven at controlled speed
• Load and pressure are gradually increased
• Oil is circulated through:
• Compressor
• Condenser
• Evaporator

If procedure is not performed

• Compressor may be damaged
• Increased noise and wear
• Reduced cooling performance
• Shortened compressor lifespan

After break-in

• Verify AC pressure and temperature
• Check for abnormal noise
• Confirm stable cooling operation

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