Ventilation

Ventillation:

The vehicle has a flow-through ventilation system. A supply of outside air flows into the vehicle when the blower motor is running. When the side windows are closed, some air will flow to the following areas:
^ Into the cowl air inlet grille (1)
^ Through the vehicle
^ Out through the vehicle body pressure relief valves

Pressure Relief Valve:

The compressor is equipped with a pressure relief valve. The pressure relief valve (2) is placed in the system as a safety factor. Under certain conditions, the refrigerant on the discharge side may exceed the designed operating pressure. In order to prevent system damage, engineers designed the valve in order to open automatically when the high side pressure exceeds a specified amount. Correct the following conditions that may cause the valve to open:
^ A defective A/C pressure sensor
^ An inoperative cooling fan
^ Other conditions

Replace the following items as needed:
^ The refrigerant oil
^ The refrigerant