Question about 2003 Ford Crown Victoria

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Hvac blower not operating any speed,

Hvac blower not operating,blend doors operational can jump power to motor it will run hvac control head apears ok, this is and 03 crown vic with ATC

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Have you tried replacing the blower resister module?

Posted on Oct 01, 2009

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Have you checked Fuse F1.103 40Amp in the Battery Junction Box? You also have the Blower Motor Relay located in the BJB which is feed from the Function Selector Switch

Posted on Oct 21, 2009

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1 Answer

Blower fan not working at all 2004 Buick rendezvous


Which system ?
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If automatic it's probably the blower motor control processor .
Blower Motor Control Processor The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, Blower motor speed signal, battery positive voltage and ground circuits enable the control processor to operate. The HVAC control module sends the commanded blower motor speed to the control processor through a 0 to 12-volt linear ramped blower motor speed control circuit. As the blower motor speed control voltage increases, the blower motor speed increases. The control processor sends the actual blower speed to the control module through a 0 to 12-volt blower motor speed signal circuit. The processor supplies 12volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.

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Automatic or manual climate control ?
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  • Circuitry short
  • A/C blower motor resistor
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Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
Normal Operation Under normal operation, the blower motor control module receives a 1-2 volt signal from the EATC module through circuit CH218 (GN/VT) to determine the desired blower motor speed. The EATC module receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the EATC module sends 12 volts to the blower control module through circuit CH217 (BN).
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There is a little motor on the heater box under the dash that needs to be replaced. It's called a blend door actuator...

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1 Answer

04 yukon slt 2wd hvac rear blower motor won;t run. jumped motor its good.


There is a rear control module and a rear data processor for the blower motor and the blend doors.
Your probably going to need a shop manual to have the test procedures for those circuits.
One orange wire goes to the module from a 10amp fuse in the box in the engine compartment, the other orange wire goes to the module from a 30amp fuse in the same box. There is a third orange wire between the front HVAC control panel and the rear module.

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Blower motor not working on 2005 buick lacrosse cxl


Blower operation is handled by the HVAC control module which gets its power from the 10A HVAC fuse in the instrument panel fuse block. There is a blower motor control processor that gets its power from the 30A BATT MAIN 4 fuse in the underhood fuse block. The HVAC control module sends speed signals to the blower motor control processor which turns on the blower motor at the selected speed. Note that there is no relay involved. If you check the fuses and check the path to the blower motor you may find that the motor is OK and the trouble is somewhere else

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1 Answer

1996 buick riviera heater blower won't run. I jumped the motor and it runs. Turn on the switch and it won't run


you have a piece of solder broken off the controller of your hvac unit, causing power not to get to the blower motor it self. take test light and see if you have power at the blower motor. check and see if you have continuty or brake between the power wire at the blower motor and at the hvac control unit. if wires are good then the problem will lie in the hvac control unit. check and see if the blower is working at all speeds, if it works on some speeds thens the blower motor resistor.

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Blend door for front temp control is stuck in the 'cold' position this winter. Is there a way to manually move and fix the door to get some heat?


you have to replace the blend (heat/cold) door motor, you can try to remove motor and turn door and try to jam something in door handle slot ,that the part that the motor turns,hope this helps.

Dec 26, 2009 | 2001 Ford Windstar

1 Answer

MY HVAC fan stopped blowing. Checked all the


Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

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