Blower motor speeds not working?

Tiny
SPENCERDAVIS
  • MEMBER
  • 2004 DODGE CARAVAN
  • 6 CYL
  • FWD
  • MANUAL
  • 154,000 MILES
Anyone tell me why a blower motor would quit running? The high speed went first leaving the lower ones working and now they quit
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Tuesday, July 5th, 2011 AT 10:38 PM

31 Replies

Tiny
MHPAUTOS
  • EXPERT
Check the blower motor resistor, it is located on the RHS of the HVAC unit under the dash, here is the location in the diagrams below so you can change it out. Check out the diagrams (Below). Please let us know what happens.
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Thursday, July 7th, 2011 AT 1:59 PM
Tiny
SPENCERDAVIS
  • MEMBER
  • 2004 DODGE CARAVAN
  • 6 CYL
  • FWD
  • MANUAL
  • 154,000 MILES
Blower motor hi speed quit. Lower speeds worked and now they quit also. Replaced resister, not it
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
RIVERMIKERAT
  • EXPERT
Verify that power is getting to the blower motor. If not, check the relay and fuses. Make sure the switch is operating properly. If power is getting to the blower, check the ground. If the blower has power and the grounds are good, you'll need to replace the blower.
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
KINGRAOH
  • MEMBER
  • 2003 DODGE CARAVAN
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Okay, so the front had quit blowing any air on any speed, no front floor or defrost either This lasted about five months. Then started back working for about four months. Now not working again. However, when driving more than 30 to 35 mph I notice a little cold air coming out in the front, but speed can't be adjusted. Also seems to be dripping a lot of water, hopefully just condensation, somewhere in the back passenger side close to exhaust pipe. The fuse for front blower motor looks okay, did not try to replace it yet. Any idea how I can fix this or get it fixed?
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

You will need a voltmeter or test light to do some checks for the blower motor circuit. It could be either the blower motor or the blower resistor.

Roy

Procedure for blower motor

Removal

Warning: on vehicles equipped with air-bags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment and possible personal injury.

NOTE: The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.

1. Disconnect and isolate the battery negative cable.
2. Remove the passenger side cowl and trim panel.
3. Position the carpet to access the front upper screw that secures the air inlet housing.
4. Remove the recirculation door actuator.
5. Disconnect the blower motor wire lead connector from the blower motor resistor or power module, depending on application.

Air Inlet Housing - LDH Shown, RHD Typical
imageOpen In New TabZoom/Print

6. Remove the one screw (from the top) that secures the lower air inlet housing to the upper air inlet housing.
7. Remove the four screws (from the bottom) that secure the lower air inlet housing to the lower HVAC housing and upper air inlet housing.

Blower Motor Grommet - Typical
imageOpen In New TabZoom/Print

8. Push the rubber grommet through the hole in the lower air inlet housing.
9. Route the blower motor wire lead through the opening in the lower air inlet housing and remove the lower air inlet housing from vehicle.
10. Position the recirculation-air door as necessary to access and remove the three screws that secure the blower motor to the lower half of the HVAC housing.
11. Gently flex the recirculation air door downward to gain access to remove the blower motor from the housing.

NOTE: To aid in installation, note the position of the blower motor mounting tabs prior to removal.

Blower Motor Mounting Tabs
imageOpen In New TabZoom/Print

12. Remove the blower motor from the HVAC housing by rotating and tilting the blower motor as necessary.

INSTALLATION
1. Gently flex the recirculation air door far enough to position the blower motor and wheel into the lower half of the HVAC housing.
2. Position the recirculation-air door as necessary to install the three screws that secure the blower motor to the blower housing in the lower half of the HVAC housing. Tighten the screws to 2 N-m (17 in. Lbs.).
3. Reach through the fresh air intake opening to access and engage the upper pivot receptacle of the recirculation-air door with the pivot post of the upper intake air housing.
4. Feed the blower motor wire harness connector through the grommet hole in the lower intake air housing and seat the rubber grommet
5. Position the lower intake air housing onto the HVAC housing and upper intake air housing. Be certain that the splined output shaft of the recirculation door actuator is properly engaged with the splined receptacle on the bottom of the recirculation-air door.
6. Install the three screws that secure the lower air intake housing to the lower half of the HVAC housing. Tighten the screws to 2 N-m (17 in. Lbs.).
7. Install the two screws that secure the upper intake air housing to the lower intake air housing. Tighten the screws to 2 N-m (17 in. Lbs.).
8. Install the HVAC wire harness for the recirculation door actuator to the routing clips molded into the bottom of the lower intake air housing.
9. Connect the blower motor wire harness connector the blower motor resistor block or blower motor power module, depending on application.
10. Install the instrument panel

Resistor

1. Disconnect and isolate the battery negative cable.
2. Open the glove box.
3. Flex both sides of the glove box bin inward near the top far enough for the rubber glove box stop bumpers to clear the sides of the glove box opening, then roll the glove box downward.

Fig.10 Blower Motor Resistor
imageOpen In New TabZoom/Print

4. Reach through the glove box opening to access and disconnect the instrument panel wire harness connector for the blower motor resistor from the resistor connector receptacle.
5. Reach through the glove box opening to access and disconnect the blower motor pigtail wire connector from the resistor connector receptacle.
6. Remove the two screws that secure the blower motor resistor to the evaporator housing.
7. Remove the blower motor resistor from the evaporator housing.

INSTALLATION

CAUTION: Do not operate the blower motor with the blower motor resistor removed from the circuit. Failure to take this precaution can result in vehicle damage.

1. Position the blower motor resistor into the evaporator housing.
2. Install and tighten the two screws that secure the blower motor resistor to the evaporator housing. Tighten the screws to 2 Nm (17 in. Lbs.).
3. Reconnect the blower motor pigtail wire connector to the blower motor resistor connector receptacle.
4. Reconnect the instrument panel wire harness connector for the blower motor resistor to the resistor connector receptacle.
5. Flex both sides of the glove box bin inward near the top far enough for the rubber glove box stop bumpers to clear the sides of the glove box opening, then roll the glove box upward.
6. Close and latch the glove box.
7. Reconnect the battery negative cable.
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
CSIAS40
  • MEMBER
  • 2003 DODGE CARAVAN
Air Conditioning problem
2003 Dodge Caravan Front Wheel Drive Automatic

Air conditioner blower works intermittently. Air is cold when it isn't blowing, but can barely feel it even at high driving speed. The blower is intermittent. Only a problem for the front. Back works fine.
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
Check the blower motor
place the switch at high and check the connector at the motor for power and ground
and if you have the two replace the motor

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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
RAJNAGARAJA
  • MEMBER
  • 2002 DODGE CARAVAN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 123,000 MILES
Hi there,

So my fan control for my heater is not working properly for both front and auxillary (rear) heat.

I can have it on full blast or it shuts off. Didn't know if this is a fuse issue, relay issue, or what? And how do I go about repairing it. BTW -- this is a Dodge Grand Caravan with rear heating.

Thanks for the help!
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
CH112063
  • MEMBER
Each has a fuse and relay, I would check the fuses first, but the blower speeds run through resistors in a spot mounted on the front heater/ac unit, behind the glove box, ok You do have a test light?
You need one to test for voltage on each side of the fuse olocation. I would try to get one working at a time, use a test light to check both the fuses and for voltage at the resistor and behind the control switch. They sell a nice 6-12 volt test light at the store, its the best way, ok? Not expensive, and you'll always have one.
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
EVERCAMEN
  • MEMBER
  • 2001 DODGE CARAVAN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
My AC/Heater control will only work on high speed. I have replaced the Blower Motor Speed Resister which corrects the problem. The new resister allows the blower to operate in all speeds.

But, the new Resister only lasts 2-3 weeks before it goes bad. I've relaced it 3 times in two months. Any idea why the Resister would keep failing?
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
Have you checked the wiring and plug
also check if the motor pulling to must current
check the air flow around the resister
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Tuesday, November 3rd, 2020 AT 9:02 AM (Merged)
Tiny
EVERCAMEN
  • MEMBER
The plug and wiring appear to be good. No knicks or cuts. I believe I will replace the blower motor. I had someone tell me that it could be pulling too much current on the lower speeds. And, tonight, I found a reply to this problem in the Town and County forum. The responder indicated that if after replacing the resister, it fails again, the blower is bad. Thank you for your reponse.
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
Please let us know who it goes after the motor
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
PCOS_US
  • MEMBER
Don't forget to replace/remove the in-cabin air filter. I first replaced the resister and it burned up in a few weeks. If the in-cabin air filter is clogged it keeps the air from freely flowing over the resistor and it will burn up repeatedly. The filter will drop out of a hatch below the glove box. I simple removed it and did not replace it.
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
DANI0874
  • MEMBER
  • 2001 DODGE CARAVAN
I have been having a problem with my 2001 Dodge Grand Caravan sport it has about 79,000 miles, The heater/AC will only blow when I have it on high. The other problem we are having is when we are driving the passenger side floor board is letting in cold air. Could you possilby know what could be causing these and are they related?
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
2CARPRO JACK
  • EXPERT
Fan speed will be either the blower motor resistor or the switch, most likely the resistor. Cold air coming in. If there are no obvious holes then put the car in a dark garage, get in and shut the door. Have someone shine a flashlight where the air is coming in and look for the light
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
DANI0874
  • MEMBER
Thank you for you prompt response, we will get that changed and let you know how it goes.
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
DANI0874
  • MEMBER
Where is the resistor, under the glove box or in the engine?
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
MRDCHIP
  • MEMBER
  • 2000 DODGE CARAVAN
  • 6 CYL
  • AUTOMATIC
  • 68,000 MILES
The blower on my 2000 Dodge Caravan was making a grinding noise at low speeds, as the speed of the blower was increased the noise seemed to disappear. Now the blower has stopped working altogether.
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)
Tiny
RASMATAZ
  • EXPERT
Open it up and inspect the blower motor housing-also check the AC/Heater fuse, blower motor relay, resistor and bower motor-also do this power the blower from the battery and see if it'll come on.
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Tuesday, November 3rd, 2020 AT 9:03 AM (Merged)

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