Step | Action | Yes | No |
|---|---|---|---|
1 | Is the effort to move the control for adjusting the temperature high or low? | Go to Step 4 | Go to Step 2 |
2 | Is the effort to move the control for the mode positions high or low? | Go to Step 20 | Go to Step 3 |
3 | Is the effort to move the control for the blower speeds high or low? | Go to Step 14 | System OK |
4 | Inspect for proper control knob installation. Is the control knob installed properly? | Go to Step 6 | Go to Step 5 |
5 |
Does the condition persist? | Go to Step 6 | System OK |
6 | Is excessive effort required in order to change the settings? | Go to Step 7 | Go to Step 12 |
7 | Remove the temperature control cable from the control assembly. Refer to Temperature Control Cable Replacement . Is excessive effort required in order to change the settings? | Go to Step 8 | Go to Step 9 |
8 | Replace the control assembly. Refer to Control Assembly Replacement . Is the repair complete? | System OK | -- |
9 | Remove the temperature control cable from the temperature valve. Does the temperature valve move without binding? | Go to Step 10 | Go to Step 11 |
10 | Replace the temperature control cable. Refer to Temperature Control Cable Replacement . Is the repair complete? | System OK | -- |
11 | Repair the temperature valve for binding. Refer to Temperature Valve Replacement . Did you find and repair the condition? | System OK | -- |
12 | Low effort is required in order to change the settings. Do the control settings change position when the vehicle is moving? | Go to Step 13 | System OK |
13 | Replace the control assembly. Refer to Control Assembly Replacement . Is the repair complete? | System OK | -- |
14 | Is excessive effort required in order to change the settings? | Go to Step 15 | Go to Step 18 |
15 | Inspect for visual binding of the controls. Is visible binding evident? | Go to Step 16 | Go to Step 17 |
16 | Repair or replace the blower switch. Refer to Blower Switch Replacement . Is the repair complete? | System OK | -- |
17 | Replace the blower switch. Refer to Blower Switch Replacement . Is the repair complete? | System OK | -- |
18 | Low effort is required in order to change the settings. Do the control settings change position when the vehicle is moving? | Go to Step 19 | System OK |
19 | Replace the blower switch. Refer to Blower Switch Replacement . Is the repair complete? | System OK | -- |
20 | Is excessive effort required in order to change the settings? | Go to Step 21 | Go to Step 24 |
21 | Inspect for visual binding of the controls. Is visible binding evident? | Go to Step 22 | Go to Step 23 |
22 | Repair or replace the control assembly. Refer to Control Assembly Replacement . Is the repair complete? | System OK | -- |
23 | Replace the control assembly. Refer to Control Assembly Replacement . Is the repair complete? | System OK | -- |
24 | Low effort is required in order to change the settings. Do the control settings change position when the vehicle is moving? | Go to Step 25 | System OK |
25 | Replace the control assembly. Refer to Control Assembly Replacement . Is the repair complete? | System OK | -- |
