Question about 2003 Ford Taurus

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Heater blower comes on sometimes. did self test and got code 125.

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Check for vacuum leak and that electric connection is connected.Hope that Helps

Posted on Jan 03, 2014


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Why am I getting heat out of one duct with ac on. and sometimes after it runs a while you can hear the blower but little air from the ducts.

wow1, no statement of you have manual HVAC or the
AZC options automatic zone controls. (apples and org, diffr)
or is your car the MTC HVAC (manual temp controls)?????
what is your question>?
are you saying, it worked ok before core change
or fails before and after core change,??
my guess, after....

did you run the self test ? (guessing AZC)

for sure the damper are failing
only 2 ways do do that
controls bad
or the actuator bad. (or the wire between) maybe even fuses?

the WJ, the book is free.
read chapter 24 HVAC yet?

the AZC has 4 electric damper motors. (actuators)

chapter 24 and 8w cover hvac. i FSM
ill now post AZC self test, (posted here 10 times now)
To enter the AZC self-diagnostic mode, perform the
(1) Depress the A/C and Recirc buttons at the
same time and hold. Rotate the left temperature control
knob clockwise (CW) one detent.
(2) If you continue to hold the A/C and Recirc buttons
depressed, the AZC control module will perform
a Segment Test of the vacuum fluorescent (VF) display.
In the Segment Test you should see all of the
display segments illuminate as long as both buttons
are held. If a display segment fails to illuminate, the
vacuum fluorescent display is faulty and the heater-
A/C control must be replaced.
(3) After viewing the Segment Test, release the
A/C and Recirc buttons and the display will clear
momentarily. If a 0 is displayed, then no faults
are set in the system. Should there be any faults,
either "current9 or "historical", all fault codes will be
displayed in ascending numerical sequence (note no
effort is made to display fault codes in chronological
order). Each fault code is displayed for one second
before the next code is displayed. Once all fault codes
have been displayed, the system will then repeat the
fault code numbers. This will continue until the left
side set temperature control is moved at least one
detent position in the CW direction or the ignition is
turned "OFF".

end quote
if no AZC , nows the time to say..... right?

Mar 15, 2016 | 1999 Jeep Grand Cherokee Limited

1 Answer

Blinking AC button of Honda Civic 2003

HONDA CIVIC 2001 - 2005
How to retrieve DTC:
The heater control panel has self-diagnosis function. To run the self-diagnosis function, do the following:
1.Turn the blower fan OFF.
2.Press and hold the recirculation control switch and the rear window defogger switch down.
3.Turn the ignition switch ON (ll).
4.Release both switches. The recirculation indicator and the rear window defogger indicators come on. The recirculation indicator goes off 3 seconds later and the A/C indicator comes on, then the self-diagnosis will begin. About 10 seconds later, the self-diagnosis will finish and the A/C indicator goes off.
- If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty circuit or component.
- If the system is ok, the recirculation indicator stays off.

DTC (Recirculation indication blinks) Detection Item Page
7An open in the air mix control motor circuit.21 - 16
8A short in the air mix control motor circuit.21 - 16
9A problem in the air mix control linkage, door, or motor.21 - 17
10An open or short in the mode control motor circuit.21 - 18
11A problem in the mode control linkage, doors, or motor.21 -19
12A problem in the blower motor circuit.21 - 20
13A problem in the EEPROM in the heater control panel;
14An open in the evaporator temperature sensor circuit.21 - 23
15A short in the evaporator temperature sensor circuit.21 - 24
- In case of multiple problems, the recirculation indicator will indicate only the DTC with the least number of blinks.
- In case of an intermittent failure, the heater control panel will store the DTC until the ignition is turned off.

Mar 17, 2013 | 2003 Honda Civic

2 Answers

1998 Dodge Ram heater air flow not working

check and test blower --possible motor failure

Aug 29, 2017 | 1998 Dodge Ram 1500 4WD

1 Answer

Nothing happens when i turn on my heater. No sound no heat. Sometimes it comes on when I hit a bump. Now nothing is happining. Could it be the switch behind? Could it have come disconnected some how? And...

check the connection on the heater blower its self, remove the panel under the dash on the passengers side of the car and the heater blower is to the left next to the door it should be fairly easy to reach up and just push on the plug and then check to see if it kicks on bumps can cause wires to get loose over time and more often than not a loose wire can be the cause of alot of grief

Dec 04, 2011 | 2004 Pontiac Grand Prix

1 Answer

How do i replace switch for heater in my 2004 Grand prix

more than likley its the heater motor its self but befor you change anything remove the trim around the radio and heater then remove the screws from the bracket that holds the heater controll in place then gently pull it out of the hole there and remove the plug on the back it will be the one on the right if looking at the controll knobs, then using a test light turn heater on and touch each contact to see if you get power there if so then more than likley the heater controll if fine and the heater motor is bad this happen alot more than you think those controlls rarley go bad usualy its the motor and to get to this, you remove the underside of the dash on the passenger side and you should see the heater motor next to the door area just in the corner under the glove compartment, it is possable you may have to remove the glove compartment incert as well mine has 3 screws holding it in 10mm heads with a philips "+" slot in the center of each screw head it sounds worse than it is its not hard at all to change but again befor removing unplug the connecter there and using the test light with the heater on test each lead to see if power is coming through if it is then motor is bad if not that doesnt mean the controller is it could be the blower relay its located next to the blower if it goes bad then the heater blower wont come on either except high providing the resister has a pass through it it doesnt it will not come on at all

Dec 04, 2011 | 2004 Pontiac Grand Prix

1 Answer

Check engine light comes on my mechanic's computer can't find any code for a problem.....took it to Volvo, they said same thing, turned it off (so I could get it inspected), two days later, it came...

the only thing i can think of is the vent for the fuel tank. this can sometimes give a code but if it fixes itself the code will remove its self but the engine light will stay on. it can also be an electrical fault if it does this when you turn on lights or heater blowers. this can sometime doe this aswell ecu reads a power drain, this can be down to 3 things battery alternator or a bad earth. hope this helps.

Jun 03, 2017 | 2004 Volvo C70

1 Answer

Heater blower motor does not blow. I replaced the fuse and the relay. I understand there is something, a control switch?, other than the blower motor that could be the problem.

Yes, the blower motor resistor is a part which frequently goes out. What you need to do is follow the wires from your heater blower until they come to a connection on the Firewall or on the ductwork under the hood. This connection will have 2 screws and if you tap the connection, sometimes the part will start working again.

The part itself is about the size of a pack of cigarettes with about 90% hidden in the ductwork or Firewall. Depending on how close the rear heater hose from your motor is to this part, you may have to disconnect a water line. The good part is you can test the new part by simply placing the connector on the new part before removing the old part.

There is also a test which can be performed on Digital Climate controls which will diagnose problems in the system. For this test there is a separate Code list and a trigger procedure for the self-diagnosis. A technician can retrieve the info in less than 4 minutes without tools. Each unit may have a different trigger procedure depending on the suppliers' chip.

With the items you have replaced you may need both the motor and the resistor because many times the resistor does not ruin a relay and a fuse. This is why I brought up the self-diagnostics.

I hope I have been helpful in solving your problem.

Dec 30, 2010 | 2003 Lincoln Town Car

2 Answers

Heater blower on van won't come on. Already replaced heater blower and checked fuses.

Check blower motor resistor make sure none of the spring's are broken, resistor sit next to blower motor in housing, also check blower motor relay for voltage, also sit over by blower motor outside of housing and last check voltage at blower motor switch.Hope this was very helpful,good luck.

Mar 25, 2010 | 1989 Chevrolet Astro Cargo

1 Answer

2001 Merc Marq automatic ac blower motor stopped working. I wired blower directly to battery with a fused switch. This has worked for past 9 months----but, now the compressor stays on when the switch is...

check the fuses and blower motor resister first. Some systems don't have resisters. Use blower motor speed control instead.

SECTION 412-04: Control Components 2001 Crown Victoria/Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Blower Motor Speed Control Removal and Installation
  1. Disconnect the wire harness connector.
  1. Remove the screws and remove the blower motor speed control.
  1. To install, reverse the removal procedure.

  • The blower motor is inoperative—EATC
  • Fuse.
  • Circuitry open or shorted.
  • A/C blower motor switch.
  • A/C blower motor resistor.
  • A/C blower motor.
  • Go To Pinpoint 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 diagnostic 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 carrying out 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 the 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.

Apr 16, 2009 | 2001 Mercury Grand Marquis

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