Operation CHARM
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Buick
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1991
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Regal V6-191 3.1L
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Component Tests and General Diagnostics
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System Operation Check
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System Check - Air Delivery & Temperature Controls
System Check - Air Delivery & Temperature Controls
Air Valve Position Chart:
Air Valve
Position Chart
^ Use the
Air Valve
Position Chart as a guide to normal operation.
^ Refer to Symptom Table when a result is not normal.
Symptom Table