For 1990-2009 cars

COMPLAINT/CONDITION | POSSIBLE CAUSE(S) | CORRECTION(S)
--- | --- | ---
Blower Motor Noise/Vibration | Debris in blower | Remove debris.
Damaged blower motor bearing | Replace blower motor assembly.
Blower motor not properly installed | Install blower motor assembly properly into retaining groove.
Odor From Air Outlets | Module condensate drain plugged | Remove condensate drain and remove restriction.
Debris in evaporator case | Remove blower motor assembly and remove debris.
Debris trapped in cabin air filter | Replace cabin air filter.
Temperature Knob - Difficult to Turn/Binds | Pinched temperature cable | Verify proper routing of cable.
Cable improperly installed to control head | Verify proper installation.
Cable kinked during installation | Replace cable.
Cable improperly installed into module adjustment clip | Remove and re-install cable to adjustment clip
Debris in control head gears | Remove debris from gears.
Temperature/Mode Knobs Limited Rotation | Knob installed improperly | Remove, rotate 180 degrees and re-install
Recirculation Light Lit - System in Outside Air | System defaults to outside air when defrost or heater/defrost is selected. | Position mode knob to mode other than defrost or heater/defrost.
A/C Compressor ON - A/C Not Selected | System defaults to A/C ON when defrost or heater/defrost is selected. | Position mode knob to mode other than defrost or heater/defrost.
A/C Compressor Cycling at Low Ambient | Low ambient evaporator freeze protection software | Normal operation - see ELAP parameters in electronic compressor control section.
Reduced or Low Airflow from Outlets | Cabin air filter is dirty. | Replace cabin air filter.