| Condition | Possible Cause | Action |
|---|---|---|
|
Incorrect temperature output
|
Control cables broken or binding
|
Check control cables.
|
|
Temperature control lever faulty
|
Check temperature control lever.
|
|
|
Control cable clamp position is faulty
|
Check and adjust.
|
|
|
Air damper broken
|
Repair air damper.
|
|
|
Air ducts clogged
|
Repair air ducts.
|
|
|
Heater core leaking or clogged
|
Replace heater core.
|
|
|
Heater hoses leaking or clogged
|
Replace heater hoses.
|