Normal Ventilation In Regulating Mode
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To check normal ventilation in regulating mode, set temperature selector knob to White range (vertical). Set mode control knob to 4-o'clock position. Ensure A/C button indicator is illuminated. Air will vent from upper and lower outlets and A/C compressor will engage. Ambient air will flow from center outlet and coolant circulation pump will operate. If operation is not as specified, perform the following in order:
- Check A/C button activation. See A/C BUTTON under ELECTRICAL TESTS.
- Check A/C pressure switch. See A/C REFRIGERANT PRESSURE SWITCH under ELECTRICAL TESTS.