VUE AWD V6-3.5L VIN 4 (2004)
Radiator Cooling Fan Resistor: All Technical Service Bulletins
A/C - Hissing Noise
File in Section: 01 - HVAC
Bulletin No.: 04-01-37-006
Issue Date: May, 2004
Subject:
Heater-Ventilation-Air Conditioning (HVAC) Hiss-Type Noise
(Replace Low Speed Engine Cooling Fan Resistor)
Models Affected:
2002-2004 Saturn VUE Vehicles with Two-Speed Cooling Fan
Attention: Fixed Operations Manager and Technician
Models Affected Chart
Condition:
Some customers may comment on a "hiss"-type noise when the air conditioning (A/C) compressor is turned OFF. The hiss-type noise may also be heard
if the cooling fan comes on in the high-speed mode with A/C compressor ON.
Cause:
When the A/C compressor comes on, the engine cooling fan should be on in the low speed mode. If the fan is inoperative in low speed mode, the
condenser will not have the ability to fully condense the gas refrigerant to a liquid state, and eventually the gas will reach the thermal expansion valve
(TXV). The TXV is not designed to expand gas and may make a hiss-type noise if gas refrigerant is going through it.
Correction:
Replace engine cooling fan low speed resistor assembly.
Service Procedure:
1.
Verify customer concern.
2.
Start vehicle and turn on A/C request switch. A/C compressor should be engaged if ambient temperature is greater than 2°C (35°F).
