how to fix ac compressor oil leak

Fixing an AC compressor oil leak can be a complex task and may require the skills of a qualified HVAC technician. The compressor is a critical component of your air conditioning system, and any oil leak should be addressed promptly to prevent further damage. Here are some general steps that may help resolve an AC compressor oil leak:

Note: Working on air conditioning systems requires knowledge of HVAC systems and refrigerants. If you are not experienced in HVAC repair, it’s best to hire a professional technician to handle the repair.

Materials You May Need:

  1. Leak detection dye: To help locate the source of the oil leak.
  2. UV light: To detect the dye and pinpoint the leak.
  3. Replacement gaskets or seals: If necessary.
  4. Refrigerant recovery equipment: To recover and store any refrigerant.
  5. Ratchet and socket set: To disassemble components.
  6. AC compressor oil: For refilling the system (specific type required for your AC system).


  1. Turn Off the AC System:
    • Ensure that the AC system is turned off and the power supply is disconnected.
  2. Locate the Leak:
    • Use leak detection dye and a UV light to identify the source of the oil leak. This will help pinpoint the exact location of the leak.
  3. Isolate the Compressor:
    • If the leak is coming from the compressor, isolate it from the rest of the system by closing any necessary valves or disconnecting refrigerant lines.
  4. Replace Gaskets or Seals (if needed):
    • If the leak is due to damaged gaskets or seals, you may need to replace them. Consult your AC system’s manufacturer or service manual for the correct replacement parts.
  5. Address Any Cracks or Damage:
    • Inspect the compressor for any cracks or physical damage. If the compressor itself is damaged, it may need to be replaced.
  6. Recover Refrigerant (if needed):
    • If the refrigerant has leaked, it must be properly recovered and stored using refrigerant recovery equipment. This ensures compliance with environmental regulations.
  7. Fix the Leak:
    • Depending on the source and severity of the leak, you may need to repair or replace the affected component, whether it’s a gasket, seal, or other part of the compressor or AC system.
  8. Reassemble the System:
    • Once the repair is complete, reassemble the AC system, making sure all connections are secure.
  9. Recharge the System:
    • Add the appropriate amount of AC compressor oil to the system, following the manufacturer’s specifications for your particular AC unit.
    • If the refrigerant was recovered, recharge the system with the correct type and amount of refrigerant.
  10. Test the System:
    • Turn on the AC system and monitor it for any signs of leaks or issues.
    • Check for proper cooling performance to ensure that the system is functioning correctly.
  11. Monitor for Leaks:
    • Continue to monitor the AC system for any signs of oil leaks or refrigerant leaks in the days and weeks following the repair.
  12. Seek Professional Help (if needed):
    • If you are unsure about any aspect of repairing an AC compressor oil leak or if the leak persists, it’s best to consult a qualified HVAC technician for assistance.

Repairing an AC compressor oil leak requires expertise and specialized equipment, and it’s essential to address the issue properly to avoid further damage to your air conditioning system. Regular maintenance and professional inspections can help prevent oil leaks and ensure the efficient operation of your AC system.