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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1712 (HVAC Systems - Automatic) >> Description and Operation >> Air Temperature Description and Operation >> A/C Operation >> Recirculation Mode

Recirculation Mode

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The recirculation door will move automatically with an input from the A/C high pressure recirculation switch. The PCM will place the A/C system in recirculation mode when a signal is sent over the A/C refrigerant high pressure cut-out switch signal circuit. This allows for the cooler inside air to flow over the A/C evaporator and cool the refrigerant temperature, until the high side pressure returns to normal. The PCM sends a Class 2 message to command full recirculation at 2896 kPa (420 psi).

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