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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 576 (REFRIGERANT SYSTEM [HVAC])REFRIGERANT SYSTEM PERFORMANCE TEST [L3 WITH TC]
2008 Mazda 6 s Sport, 4D Hatchback, Standard

Refrigerant System Performance Test [L3 With TC]

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Refrigerant System Performance Test [L3 With TC]
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the refrigerant pressure. (See REFRIGERANT PRESSURE CHECK [L3 WITH TC] ).
  2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.
  3. Start the engine and after it is warmed up, run it at a constant 1,500 RPM. 
  4. Set the fan speed to MAX HI.
  5. Turn the A/C switch on.
  6. Set to RECIRCULATE mode.
  7. Set the temperature control to MAX COLD.
  8. Set to VENT mode.
  9. Close all the doors and windows.
  10. Wait until the air conditioner output temperature stabilizes.

    Stabilized condition 

    • The A/C compressor repeatedly turns on and off at regular intervals.
  11. After the blower air is stabilized, read the dry-bulb thermometer.
  12. Verify the ambient temperature.
  13. Verify that the temperature reading is in the shaded zone.
    • If the there is any malfunction, inspect the refrigerant system according to the troubleshooting chart.
      Fig 1: Refrigerant System Performance Test (L3 With TC) Graph
      G04326690Courtesy of MAZDA MOTORS CORP.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.