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Home/BMW/M3/BMW M3 E46 (1999-2006)/Repair manual/Engine Cooling and HVAC - Overview/Typical Use: A/C Performance Quick Check
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Typical Use: A/C Performance Quick Check BMW M3 E46

Engine Cooling and HVAC - Overview 3 illustrations

Typical Use: A/C Performance Quick Check

Test conditions = 90°F & 50% Humidity

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Scheme 121: Typical Use: A/C Performance Quick Check
Scheme 121: Typical Use: A/C Performance Quick Check

Scheme 122

Scheme 122
Scheme 122

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Scheme 123
  1. Note ambient temperature
  2. Close all windows and doors.
  3. Engine Speed = 1500-2000 RPM.
  4. Blower Volume = Medium Speed
  5. Temperature Wheel = "Max Cold
  6. "Snowflake" Button = A/C On
  7. Test conditions > 3 minutes
  8. Center vent discharge = .20°F less than the ambient temperature.