Symptom Diagnosis

WARNING: This page is about a different car, the 1999 Lincoln Navigator and 1999 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

No Communication With EATC Module

Go to TEST A .

EATC System Inoperative, Intermittent Or Improper Operation

Go to TEST B .

Improper/Erratic Airflow From Outlets

Go to TEST C .

A/C Does Not Operate/Does Not Operate Properly

Go to TEST D .

Blower Motor Does Not Operate

Go to TEST E .

Blower Motor Operates Continuously In High Speed

Go to TEST F .

No Operation In Some Blower Settings

Go to TEST G .

Temperature Set Point Does Not Repeat After Turning Ignition Off

Go to TEST H .

Temperature Display Will Not Switch Between Celsius & Fahrenheit

Go to TEST J .

One Or More Steering Wheel Remote Control Buttons Inoperative

Go to TEST K .

Auxiliary Blower Motor Does Not Operate

Go to TEST L .

Console Blower Motor Does Not Operate

Go to TEST M .

Insufficient, Erratic Or No Heat

Go to TEST N .

A/C Is Always On

Go to TEST O .

Insufficient A/C Cooling

Go to TEST P .

Auxiliary Blower Motor Does Not Operate Properly

Go to TEST Q .

Auxiliary Blower Motor Does Not Operate Using Rear Auxiliary Blower Motor Switch

Go to TEST R .

Panel/Floor Control Does Not Operate Using Front/Rear Auxiliary Controls

Go to TEST S .

Temperature Control Does Not Operate Using Front/Rear Auxiliary Controls

Go to TEST T .

Panel/Floor & Cool/Warm Controls Do Not Operate Using Front/Rear Auxiliary Controls

Go to TEST U .

Panel/Floor Switch Does Not Operate; Console Blower Does Operate

Go to TEST V .

Auxiliary Controls Operate With Function Selector OFF

Go to TEST W .

Rear Auxiliary Blower Motor Switch Operates Only In HI

Go to TEST X .