A/C - Blower Motor Stays on HIGH

Article No.
00-1-8

1/10/00

^ AIR CONDITIONING - BLOWER MOTOR STAYS ON HIGH SPEED AFTER DESIRED TEMPERATURE HAS BEEN REACHED - EATC EQUIPPED VEHICLES ONLY

^ AIR CONDITIONING - SYSTEM DOES NOT MAINTAIN SET TEMPERATURE - EATC EQUIPPED VEHICLES ONLY

FORD:
1997-2000 EXPEDITION

LINCOLN:
1998-2000 NAVIGATOR

ISSUE
On some vehicles equipped with Electronic Automatic Temperature Control (EATC), the blower motor may stay on high after desired temperature is reached and/or the system does not maintain set temperature.

ACTION
Check for proper connection of the in-car temperature aspirator tube. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

1. Cut a piece of toilet paper or tissue paper about 3.7x3.7 cm (1.5x1.5") (paper towel will not work).

2. Turn the key on and turn fan speed to HIGH.

3. Select PANEL or VENT mode.

4. Place the piece of tissue paper over the aspirator grille opening in the bezel. If aspiration (suction) is present, the tissue paper should stick to the aspirator grille.

5. Turn the fan OFF. The tissue paper should fall off.

6. If the tissue paper falls off the aspirator grille while the fan is on HIGH, check that the aspirator tube is properly connected at the right bottom corner of the front heater. The black connector on the white flexible tube should be snapped over the black tube connected to the heater plenum. Also, check for kinks and cuts in the aspirator tube.

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 204100, 205000, 208000, 208200, 208300, 208999