Defrosting Insufficient
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Were you sent here from Symptoms or another diagnostic table? | Go to Step 2 | Go to Symptoms - HVAC Systems - Manual |
| 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 |
WARNING:
Refer to Moving Parts and Hot Surfaces Warning . |
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. Air Conditioning Compressor Malfunction
for the manual system Is the repair complete? |
Go to Step 14 | - |
| 7 | Perform the A/C system performance test. Air Conditioning (A/C) System Performance Test (L96, LC8) , or Air Conditioning (A/C) System Performance Test (LWN) , or Air Conditioning (A/C) System Performance Test (LV1) Is the A/C system operating within the specifications? |
Go to Step 9 | Go to Step 12 |
| 8 | Repair the low engine temperature concern. 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. Diagnostic Starting Point - Vehicle Is the repair complete? |
Go to Step 14 | - |
| 11 | Repair the heating concern. Heating Performance Diagnostic Is the repair complete? |
Go to Step 14 | - |
| 12 | Repair the A/C performance concern. Air Conditioning (A/C) System Performance Test (L96, LC8) , or Air Conditioning (A/C) System Performance Test (LWN) , or Air Conditioning (A/C) System Performance Test (LV1) Is the repair complete? |
Go to Step 14 | - |
| 13 | Repair the recirculation door concern. Diagnostic Starting Point - Vehicle 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 |