Compressor Clutch Does Not Engage

HVAC COMPRESSOR CLUTCH DOES NOT ENGAGE

TEST DESCRIPTION

Step 1:

Steps 2-3:

Steps 4-6:

Steps 7-11:

Steps 12-14:

Steps 15-19:

Steps 20-25:

Steps 26-31:

Steps 32-36:

The numbers below refer to the step numbers on the diagnostic table.
2. The A/C compressor relay output is disabled if engine coolant temperature is above 121°C (250°F). The engine coolant indicator will illuminate at this temperature.
6. The HVAC control assembly is inoperative when the HVAC control unit does not respond to any operator control request to enable the A/C compressor. The blower motor may still operate independent of the A/C controls.