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(2) Disconnect wire connector from the high pres- sure cut-out switch (Fig. 7). (3) Remove snap ring securing the switch in the compressor end cover (Fig. 8). CAUTION: The high pressure cut-out switch service (4) Pull switch straight out from end cover. Re- move and discard used O-ring seal (Fig. 9). To install, reverse the preceding operation using a new O-ring seal. Evacuate and charge the refrigerant COMPRESSOR HIGH PRESSURE RELIEF VALVE DIAGNOSIS The High Pressure Relief valve prevents damage to the air conditioning system if excessive pressure de- denser air flow blockage, refrigerant overcharge, or The High Pressure Relief valve vents only a small amount of refrigerant necessary to reduce system VALVE LOCATION The High Pressure Relief Valve is located on the compressor end plate. REMOVAL AND INSTALLATION (1) Using a refrigerant recovery machine, remove the refrigerant from the A/C system. (2) Rotate the high pressure relief valve counter- clockwise and separate relief valve from the vehicle To install, reverse the preceding operation using a new O-ring seal. Evacuate and charge the refrigerant COMPRESSOR MAIN OR SUB CONTROL VALVES If the main or sub control valve is leaking refrig- erant to the atmosphere, replace the main or sub REMOVAL AND INSTALLATION (1) Using a refrigerant recovery machine, remove the refrigerant from the A/C system. (2) Remove the compressor assembly. Position it to gain access to the control valves. It is not necessary Fig. 7 High Pressure Cut-out Switch Fig. 8 Remove or Install Snap Ring Fig. 9 Remove or Install High Pressure Cut-out Switch 24 - 22 HEATING AND AIR CONDITIONING Ä |