Step | Action | Yes | No |
|---|---|---|---|
DEFINITION: Time required to defrost the windshield is longer than usual. | |||
1 | Were you sent here from Symptoms or another diagnostic table? | Go to Step 2 | Go to Symptoms - HVAC Systems - Manual or |
2 |
Does sufficient air flow from the defroster outlets? | Go to Step 3 | Go to Step 10 |
3 | Measure the engine operating temperature. Does the engine reach normal operating temperature? | Go to Step 4 | Go to Step 8 |
4 |
Warning: Refer to Moving Parts and Hot Surfaces Warning in the Preface section. Does the inlet heater hose feel warmer than the outlet heater hose? | Go to Step 11 | Go to Step 5 |
5 | Test the operation of the A/C compressor clutch. Does the A/C compressor clutch engage? | Go to Step 7 | Go to Step 6 |
6 | Repair the A/C compressor clutch. Refer to Air Conditioning Compressor Malfunction for the manual system or Air Conditioning Compressor Malfunction for the automatic system. Is the repair complete? | Go to Step 14 | -- |
7 | Perform the A/C system performance test. Refer to Air Conditioning (A/C) System Performance Test. Is the A/C system operating within the specifications? | Go to Step 9 | Go to Step 12 |
8 | Repair the low engine temperature concern. Refer to Engine Fails To Reach Normal Operating Temperature. Is the repair complete? | Go to Step 14 | -- |
9 | Inspect for correct operation of the recirculation door. Is the recirculation door operating correctly? | Go to Step 14 | Go to Step 13 |
10 | Repair the air delivery concern. Refer to Diagnostic Starting Point - Heating, Ventilation and Air Conditioning. Is the repair complete? | Go to Step 14 | -- |
11 | Repair the heating concern. Refer to Heating Performance Diagnostic. Is the repair complete? | Go to Step 14 | -- |
12 | Repair the A/C performance concern. Refer to Air Conditioning (A/C) System Performance Test. Is the repair complete? | Go to Step 14 | -- |
13 | Repair the recirculation door concern. Is the repair complete? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
