For 1990-2009 cars

COMPLAINT/CONDITION | POSSIBLE CAUSE(S) | CORRECTION(S)
--- | --- | ---
Blower Motor Noise/Vibration | Debris in the blower | Remove the debris
Damaged blower motor bearing | Replace the blower motor assembly
Blower motor not properly installed | Install the blower motor assembly properly into the retaining groove
Odor From Air Outlets | Module condensate drain plugged | Remove the condensate drain and remove the restriction
Debris in the evaporator case | Remove the blower motor assembly and remove the debris
Temperature Knob - Difficult to Turn/Binds | Pinched temperature cable | Verify the proper routing of the cable
Cable improperly installed to the control head | Verify proper installation
Cable improperly installed into the module adjustment clip | Remove and re-install the cable to the adjustment clip
Debris in the control head gears | Remove the debris from the gears
Recirculation Light Lit - System in Outside Air | System defaults to outside air when defrost or heater/defrost is selected | Position the mode knob to a 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 the mode knob to a 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