High or Low Temperature Control Effort
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
High or Low Temperature Control Effort
| Step | Action | Yes | No |
|---|---|---|---|
| DEFINITION: The temperature control operates with either too much or too little effort. | |||
| 1 | Were you sent here from Symptoms or another diagnostic table? | Go to Step 2 | Go to Symptoms - HVAC Systems - Manual in HVAC Systems-Manual |
| 2 | Is one of the following a concern of the customer:
Does the temperature control operate too freely? |
Go to Step 3 | Go to Step 7 |
| 3 |
|
Go to Step 17 | Go to Step 4 |
| 4 | Inspect the connections of the temperature control cable. Is the temperature control cable disconnected from the temperature door? |
Go to Step 15 | Go to Step 5 |
| 5 | Inspect the temperature control cable and linkage at the temperature door, while operating the temperature controls. Does the temperature door move while operating the temperature controls? |
Go to Step 22 | Go to Step 6 |
| 6 | Inspect the cable casing while operating the temperature controls. Does the cable casing move, instead of the cable, while operating the temperature controls? |
Go to Step 19 | Go to Step 16 |
| 7 | Inspect the HVAC control assembly for any debris or obstructions that would increase the effort to operate the temperature controls. Are there any obstructions? |
Go to Step 21 | Go to Step 8 |
| 8 |
|
Go to Step 10 | Go to Step 9 |
| 9 | With the temperature control cable disconnected:
Does the temperature door bind with the cable disconnected? |
Go to Step 20 | Go to Step 10 |
| 10 |
|
Go to Step 17 | Go to Step 11 |
| 11 | With the temperature control cable disconnected at both ends:
Does the temperature control cable bind? |
Go to Step 18 | Go to Step 12 |
| 12 |
|
Go to Step 18 | Go to Step 13 |
| 13 | Operate the HVAC control assembly with the temperature control cable disconnected. Does the HVAC control assembly bind now? |
Go to Step 17 | Go to Step 14 |
| 14 | Reassemble the temperature control system. Is the action complete? |
Go to Step 22 | - |
| 15 | Reconnect the temperature control cable to the temperature door linkage install the cable retainers. Is the action complete? |
Go to Step 22 | - |
| 16 | Repair the lack of heating or lack of cooling condition. Refer to Diagnostic Starting Point - Heating, Ventilation and Air Conditioning . Is the action complete? |
Go to Step 22 | - |
| 17 | Replace the HVAC control assembly. Refer to HVAC Control Assembly Replacement (Chevrolet)
or HVAC Control Assembly Replacement (Pontiac)
in HVAC Systems-Manual. Is the repair complete? |
Go to Step 22 | - |
| 18 | Replace the temperature control cable. Refer to Temperature Control Cable Replacement (Chevrolet)
or Temperature Control Cable Replacement (Pontiac)
in HVAC Systems-Manual. Is the repair complete? |
Go to Step 22 | - |
| 19 | Secure the temperature control cable casing. Is the action complete? |
Go to Step 22 | - |
| 20 | Repair the binding door. Refer to Air Temperature Door Replacement . Is the repair complete? |
Go to Step 22 | - |
| 21 | Remove the debris. Is the action complete? |
Go to Step 22 | - |
| 22 | Operate the system in order to verify the repair. Did you find and correct the condition? |
System OK | Go to Step 2 |