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Test H: Defrosting Insufficient

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit reference, see CONNECTOR IDENTIFICATION  and/or WIRING DIAGRAMS  .
  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  9.
  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 temperature of inlet and outlet hoses at heater core. If inlet hose feels warmer than outlet hose, go to step  5. If inlet hose does not feel warmer than outlet hose, go to step  11.
  4. Diagnose and repair low engine temperature condition. When repair is complete, go to step  13.
  5. Test operation of A/C compressor clutch. If A/C compressor clutch engages, go to step  7. If A/C compressor does not engage, go to next step.
  6. Diagnose and repair A/C compressor clutch. See TEST G: COMPRESSOR CLUTCH DOES NOT ENGAGE . When repair is complete, go to step  13.
  7. Perform A/C system performance test. See A/C SYSTEM PERFORMANCE TEST  under PERFORMANCE TESTS. If A/C system is operating within specifications, go to next step.
  8. Inspect recirculation door for correct operation. If recirculation door is operating correctly, go to step  13. If recirculation door is not operating correctly, go to step  12.
  9. Repair air delivery concern. See TEST A: AIR DELIVERY IMPROPER . When repairs are complete, go to step  13.
  10. Repair A/C performance concern. See A/C SYSTEM PERFORMANCE TEST  under PERFORMANCE TESTS. When repairs are complete, go to step  13.
  11. Repair heating concern. See HEATING PERFORMANCE DIAGNOSTIC  under PERFORMANCE TESTS. When repairs are complete, go to step  13.
  12. Repair recirculation door concern. When repairs are complete, go to next step.
  13. Operate system to verify repair. If system operates normally, repair is complete. If system still malfunctions, go to step  1.
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