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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Refrigerant System >> Refrigerant Pressure Check (Us) >> Notes
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Refrigerant Pressure Check (Us): Notes

  1. Install the manifold gauge set. (See MANIFOLD GAUGE SET CONNECTION .)
  2. Start the engine.
  3. Prepare the vehicle as follows.
    • Vehicle is not exposed to solar radiation
    • Engine speed: 1, 500 rpm
    • A/C switch: ON
    • Air intake port: REC
    • Airflow mode: VENT
    • Airflow temperature: MAX COLD
    • Airflow volume: MAX HI
    • Hood: Open
    • All the doors and the trunk/liftgate: Close
    • All the windows: Close
    • Active air shutter (with active air shutter): Open
  4. Wait for 8 min after the engine is started.
  5. Record the pressure indicated on the manifold gauge and ambient temperature for 2 min.
  6. Verify that there are high/low pressure value readings within the shaded areas of the figure.