Defrosting Insufficient
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. 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 or Go to 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 10 | 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. Refer to Air Conditioning Compressor Malfunction
for the automatic system or to Air Conditioning Compressor Malfunction
for the manual 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 (Diesel Engine) or Air Conditioning (A/C) System Performance Test (Gas Engine w/ Electric Cooling Fan) or Air Conditioning (A/C) System Performance Test (Gas Engine w/Engine Driven Fan) or Air Conditioning (A/C) System Performance Test (HP2) . 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 - Vehicle
. 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 (Diesel Engine) or Air Conditioning (A/C) System Performance Test (Gas Engine w/ Electric Cooling Fan) or Air Conditioning (A/C) System Performance Test (Gas Engine w/Engine Driven Fan) or Air Conditioning (A/C) System Performance Test (HP2) . Is the repair complete? |
Go to Step 14 | - |
| 13 | Repair the recirculation door concern. Refer to 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 |