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Home >> Mazda >> 2011 >> 6 s Touring Plus >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Refrigerant System [HVAC] >> Refrigerant System Performance Test

Refrigerant System Performance Test

  1. Inspect the refrigerant pressure. (See REFRIGERANT PRESSURE CHECK .)
  2. Place a dry-bulb thermometer in the passenger-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.
Fig 1: Placing Dry-Bulb Thermometer In Passenger-Side Center Ventilator Outlet
G07621318Courtesy of MAZDA MOTORS CORP.
Fig 2: Center Ventilator Temperature And Ambient Temperature Resistance Graph
G07621319Courtesy of MAZDA MOTORS CORP.
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