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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C System General Servicing >> Expansion Or "H" Valve Stuck Open Gauge Readings >> Other Symptoms

Other Symptoms

Discharge Air - Warm

Evaporator - Sweating or frost.

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