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Question

Heater does not blow hot air. Is there any flap which can block the hot air. Dash gets very hot but no hot air comes out.

Submitted: 364 days and 12 hours ago.

Category: Ford

Value: $15

Status: AWAITING CUSTOMER ACTION

2000 Ford expedition 5.4L

Already Tried:
Nothing so far

Posted by Kenny Z 364 days and 11 hours ago.

Info Request

Hello and thanks for your question.
Is this an automatic climate control system (digital display and push buttons) or manual system ( knobs for selecting function,fan speed and temp) ?

Have you verified the heater hoses are too hot to hold on to with engine fully warmed up?

Does it have rear heat/a/c if so does the rear heat blow hot in the rear??

364 days and 11 hours ago.

Reply

It has digital display and push buttons. I have not verified heater hose since rear heater works.

Answer

Ok I am going to have you perform a self test on the system.I suspect you have a temp blend door actuator problem but lets start with the self test.

Electronic Automatic Temperature Control Module Self-Test
The EATC module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A scan tool must be used to retrieve these concerns.
The EATC module self-test will detect concerns in the system control functions and will display hard diagnostic trouble codes (DTCs) in addition to intermittent diagnostic trouble codes for concerns that occur during system operation. The vehicle interior temperature should be between 4° and 32°C (40° and 90°F) when performing the self-test. If the temperatures are not within the specified ranges, false in-car temperature sensor DTCs will be displayed.
The self-test can be initiated at any time. Normal operation of the system stops when the self-test is activated.
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within two seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
If any DTCs appear during the self-test, follow the diagnostics procedure given under ACTION for each DTC given.
If a condition exists but no DTCs appear during the self-test, refer to the Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Improper Operation.
To exit self-test and retain all intermittent DTCs, push the blue (cooler temperature) button. The control will exit self-test, retain all intermittent DTCs and then turn OFF (display blank).
To exit self-test and clear all DTCs, press the DEFROST button. The vacuum fluorescent display window will show 888 and all function symbols for one second. Then, the EATC control assembly will turn OFF (display blank) and all DTCs will be cleared.
Always exit the self-test before powering the system down (system turned OFF).
Intermittent DTCs will be deleted after 80 ignition switch ON cycles after the intermittent condition occurs.

Let me know what you find.......

Edited by Kenny Z on 11/23/2008 at 4:42 AM

Accepts:
Expert:	Kenny Z
Pos. Feedback:	99.7 %
Answered:	11/23/2008

Ford Technician

Ford Senior Master,Ase Master with Advanced Level,25 year Ford Tech, Auto Trans and Drivability,Etc

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