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Test G: Defrosting Insufficient

WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine. Select DEFROST mode. Select maximum blower speed. If sufficient air flows from defroster outlets, go to next step. If sufficient air does not flow from defroster outlets, go to step  10.
  2. Measure engine operating temperature. If engine reaches a normal operating temperature, go to next step. If engine does not reach a normal operating temperature, go to step  4.
  3. Select minimum blower speed. Select maximum temperature setting. Feel the temperature of the inlet and outlet hoses at heater core. If the inlet hose feel warmer than the outlet hose, go to step  5. If the inlet hose does not feel warmer than the outlet hose, go to step  12.
  4. Repair the low engine temperature concern. If repair is complete, go to step  14.
  5. If the vehicle is equipped with A/C, go to next step. If the vehicle is not equipped with A/C, go to step  14.
  6. Check operation of the A/C compressor clutch. If compressor clutch engages, go to step  8. If compressor clutch does not engage, go to next step.
  7. Repair A/C compressor clutch. See TEST F: COMPRESSOR CLUTCH DOES NOT ENGAGE . If repair is complete, go to step  14.
  8. Perform A/C system performance test. Go to A/C SYSTEM PERFORMANCE  under PERFORMANCE TESTS. If A/C system is operating within specification, go to next step. If A/C system is not operating within specification, go to step 11.
  9. Check for correct operation of recirculation door. If recirculation door is operating correctly, go to step  14. If recirculation door is not operating correctly, go to step  13.
  10. Repair the air delivery concern. See TEST A: AIR DELIVERY IMPROPER . If repair is complete, go to step  14.
  11. Repair the A/C performance concern. See A/C SYSTEM PERFORMANCE TEST  under PERFORMANCE TESTS. If the repair is complete, go to step  14.
  12. Repair the heating concern. See HEATING PERFORMANCE DIAGNOSTIC  under PERFORMANCE TESTS. If repair is complete, go to step  14.
  13. Repair the recirculation door concern. See VACUUM ACTUATORS & ACTUATOR DOORS  under REMOVAL & INSTALLATION. If repair is complete, go to next step.
  14. Operate the system to verify repair. If the system operates correctly, system is okay. If the system does not operate correctly, go to step  1.
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