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Home >> Mazda >> 2002 >> 626 ES, Automatic >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System >> Refrigerant System >> Refrigerant Pressure Check

Refrigerant Pressure Check

  1. Install the manifold gauge set.
  2. Warm up the engine and run it at a constant 1,500 rpm. 
  3. Set the fan switch at 4th position.
  4. Turn the A/C switch on.
  5. Set the RECIRCULATE mode.
  6. Set the temperature control to MAX COLD.
  7. Set the VENT mode.
  8. Close all the doors and windows.
  9. Measure the ambient temperature and the high-and low-pressure side reading of the manifold gauge.
  10. Verify that the intersection of the pressure reading of the manifold gauge and ambient temperature is in the shaded zone.
    Fig 1: Manifold Gauge Pressure Specifications - High & Low Pressure Reading Vs. Ambient Temperature
    G01136356Courtesy of MAZDA MOTORS CORP.
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