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Home >> Subaru >> 2023 >> WRX GT >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Heater, Ventilator And A/C) >> Refrigerant Leak Check >> Inspection

Refrigerant Leak Check: Inspection

  1. Check the refrigerant gas pressure. Ref. to AIR CONDITIONER>REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET>PROCEDURE>CHECK REFRIGERANT GAS PRESSURE .
  2. Stop the engine.
  3. Using an electronic leak detector (leak tester), start the leak test.
    Items Condition Corrective action
    Pipe Check the connection between pressure sensor and pipe. Replace the pressure sensor.
    Check the connection between pipe and condenser. Check the O-ring at connection and tightening torque. If necessary, replace each part.
    Condenser Check the welded part of condenser and core. Replace the condenser.
    Hose (high-pressure) Check the connection between hose (high-pressure) and compressor. Check the O-ring at connection and tightening torque. If necessary, replace each part.
    Check the connection between hose (high-pressure) and condenser. Check the O-ring at connection and tightening torque. If necessary, replace each part.
    Check the connection between pressure sensor and hose (high pressure). Replace the pressure sensor.
    Check the rubber part of the flexible hose and pipe seam.
    CAUTION: Carefully check the external surface of flexible hoses and pipes at approx. 25 mm (0.98 in) per second.

    Check the valve and cap in the service port.    		 Replace the hose (high pressure).
    Check the rubber seal of the valve and cap. If necessary, replace valve or cap.
    Compressor Check the compressor pulley and vicinity of shaft seal.
    CAUTION: Some shaft seals will show a slight amount of leakage, about 3 g (0.1 oz) per year. This is not a problem.
    		 Replace the compressor.
    Hose (low-pressure) Check the connection between hose (low pressure) and expansion valve. Check the O-ring at connection and tightening torque. If necessary, replace each part.
    Check the connection between hose (low pressure) and compressor. Check the O-ring at connection and tightening torque. If necessary, replace each part.
    Check the rubber part of the flexible hose and pipe seam.
    CAUTION: Carefully check the external surface of flexible hoses and pipes at approx. 25 mm (0.98 in) per second.
    		 Replace the hose (low pressure).
    Check the valve and cap in the service port. Check the rubber seal of the valve and cap. If necessary, replace valve or cap.
    Check the connection between hose (low pressure) and pipe. Check the O-ring and lock spring at the connection. If necessary, replace each part.
    Evaporator Remove the drain hose from the heater case, and check the end part for 10 seconds or more. Replace the evaporator.
    Check the air vent grille.
    NOTE: Turn the ignition switch to ON, and run the blower at high speed for approx. 1 minute. Stop the blower to check the air vent grille on the instrument panel. While moving the tester closer to the grille, run the blower for 1 or 2 seconds, then stop it. Check the grille at that position for at least 10 seconds.
    		 Replace the evaporator.
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