Defrosting Insufficient
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Defrosting Insufficient
| 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 Symptoms - HVAC Systems - Automatic |
| 2 |
|
Go to Step 3 | Go to Step 10 |
| 3 | Measure the engine operating temperature. Does engine reach a normal operating temperature? |
Go to Step 4 | Go to Step 8 |
| 4 |
CAUTION:
Refer to Moving Parts and Hot Surfaces Caution
in Cautions and Notices.
|
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 HVAC Compressor Clutch Does Not Engage
in HVAC Systems-Automatic or to HVAC Compressor Clutch Does Not Engage
in HVAC Systems-Manual. 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
in Engine Cooling. 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 Air Delivery Improper
in HVAC Systems - Automatic or to Air Delivery Improper
in HVAC Systems - Manual. Is the repair complete? |
Go to Step 14 | - |
| 11 | Repair the heating concern. Refer to Heating Performance Diagnostic (Front System only) or Heating Performance Diagnostic (Auxiliary System) . 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. Refer to Air Recirculation Malfunction
in HVAC Systems - Automatic or to Air Recirculation Malfunction
in HVAC Systems - Manual. 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 |