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housing) through the hole in the housing. Feed the (3) Work through the air inlet opening (to the left of the blower motor wheel). Pull the fin-sensing cycling To install, reverse the preceding operation. The switch probe should not be installed in the original LOW OR DIFFERENTIAL PRESSURE CUT-OFF The Low Pressure Cut-Off (LPCO) Switch (Fig. 21) monitors the refrigerant gas pressure on the suction side of the system. The LPCO is located on the ex- LPCO SWITCH DIAGNOSIS The work area must not be below 10°C (50°F) to test the compressor clutch circuit. (1) With gear selector in park or neutral and park brake set, start engine and allow to idle. (2) Raise hood and disconnect LPCO switch con- nector boot. (3) Using a suitable jumper wire, jump across the terminals inside wire connector boot. (4) If the compressor clutch does not engage, the cycling clutch switch, wiring, relay, or fuse can be (5) If clutch engages, connect manifold gauge set. Read low pressure gauge. At pressure above 97 kPa (6) Install connector boot on switch and repeat step number 3. If the clutch does not engage, replace the REMOVAL AND INSTALLATION WARNING: THE REFRIGERATION SYSTEM MUST Fig. 21 Low Pressure Cut-Off Switch Fig. 19 Remove or Install Wire Harness Grommet Fig. 20 Remove or Install Fin-sensing Cycling Clutch Switch 24 - 54 HEATING AND AIR CONDITIONING Ä |