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Home >> Buick >> 1987 >> Electra Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> A/C-Heater System - Automatic >> Component Functions >> Control Head Operating Modes >> "BI-LEVEL" Mode

"BI-LEVEL" Mode

In this mode, the system will let air enter the vehicle only through the bi-level heater and A/C outlets. This mode is automatic in that it can bring the vehicle to the guide temperature range selected, and control fan blower speed and air inlet by interpreting various input signals. This mode is also good for defogging side windows.

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