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Home >> Chevrolet >> 1992 >> APV >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Gasoline >> Trouble Codes >> Code 69, A/C Head Pressure Switch 3.8L
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Code 69, A/C Head Pressure Switch 3.8L

A/C head pressure switch opens ground at 210 psi (14.77 kg/cm2 ). When switch is open, fans should run at high speed. If Code 69 is set, engine cooling fans will run at high speed anytime A/C is requested.

Fig 1: Code 69, Schematic, A/C Head Pressure Switch 3.8L
G92D21801Courtesy of GENERAL MOTORS CORP.
Fig 2: Code 69, Flow Chart, A/C Head Pressure Switch 3.8L
G91F07377Courtesy of GENERAL MOTORS CORP.