Operation CHARM
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GMC Truck
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1994
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G 3500 1 Ton Van V8-454 7.4L
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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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Initial Inspection and Diagnostic Overview
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Preliminary Checks - HVAC
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Compressor Controls - Front A/C
Compressor Controls - Front A/C
1.
Check condition of HTR A/C fuse. It fuse is blown, locate and repair source of overload. Replace fuse.
2.
If fuse is not blown, proceed with diagnostics.