Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSBUICK1996ROADMASTER BASEREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHVAC SYSTEM - MANUALOPERATIONA/C-HEATER CONTROL PANELDEFROST

1996 Buick Roadmaster Base

A/C-Heater Control Panel: Defrost

1996 Buick Roadmaster BaseSECTION Defrost

In defrost (symbol) position, a majority of conditioned air is distributed to windshield and side windows and a small bleed goes to floor outlets. This setting also requests A/C to the PCM.

Fig 1: Identifying Electronic A/C-Heater Control Panel

Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.