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ford mercury lincoln climate control auto matic heater problems

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Let’s start with a self test of the system, assuming the car/ suv has EATC and not manual A/C. To do this you press the OFF and FLOOR buttons simultaneously, release, then within two seconds press the AUTO button. Some models are slightly different- you press the OFF and FLOOR buttons simultaneously, then (while holding the two buttons) press the AUTO button. You should see a tracer line running in a square/circle for maybe 30 seconds, then a code should appear. If it is 888, no faults were found in the electronics. If another number comes up, send that to me and I will look it up.

These autoclimate control units go bad all the time and I rebuild them for you, it takes a few days.

The blower relay is in the junction box under the hood. If you have the owners manual there is a diagram that shows the location of fuses and relays. The other fan control is an electronic speed controller, mounted an the case near the blower motor.  /q/Ford-Repair-811/Climate-control-Fan.htm “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 NGS tester 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 (DTC) in addition to intermittent diagnostic trouble codes for concerns that occur during system operation. The vehicle interior temperature should be between 4°-32°C (40-90°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) button. The control will exit self-test, retain all intermittent diagnostic trouble codes and then turn OFF (display blank).
To exit self-test and clear all diagnostic trouble codes, 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.

Powertrain Control Module Diagnostic Trouble Code (DTC) Index DTC Description Action
P1460                 WOT A/C cutout circuit malfunction REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1464                  A/C demand out of self test range GO to DTC P1464.

ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX NGS DTC EATC

Description Action to Take
(Hard) Self-Test Faults (Intermittent) Run-Time Faults
B1249                          024 022 Blend door short
025 Blend door failure GO to DTC B1249.
B1251                          031 N/A A/C in-car temperature sensor open circuit GO to DTC B1251.
B1253                          030 N/A A/C in-car temperature sensor short to ground GO to DTC B1253.
B1255                          041 043 A/C ambient temperature sensor open circuit GO to DTC B1255.
B1257                         040 042 A/C ambient temperature sensor short to ground GO to DTC B1257.
B1261                          050 052 A/C solar radiation sensor circuit short to ground GO to DTC B1261.
U1073                                           N/A N/A SCP invalid or missing data for engine coolant REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
U1341                                           N/A N/A SCP invalid data for vehicle speed REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. ”


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