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What cause a blower motor to stop the blower switch worked on high only

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  • Anonymous Dec 09, 2016

    no car, no year, now car maker.
    no joy

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  • Cars & Trucks Master
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Didnt specify type of unit assuming a vehicle -generic answer --need to test the switch --fan speed resistor module --and fan motor this link is a gm unit but shows similar tests to be done for other vehicles

Posted on Dec 09, 2016

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Posted on Jan 02, 2017

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SOURCE: The heater / ac blower

It is the blower resister. I purchasted one at auto zone for $18.00. It is located under the passenger side dash. You need to remove the glove box and the plastic cover under the dash to expose the blower motor. the blower motor resister is right next to the motor. Simply unplug the resister remove the two screws and replace. I did this and now my fan works on all speeds.

Posted on Sep 17, 2008

emissionwiz
  • 76673 Answers

SOURCE: Blower motor stays on high, even with key out

the blower motor speed control module is defective, replace it.

Posted on Dec 24, 2008

  • 1 Answer

SOURCE: 1998 ford contour blower motor not working

I have a 1998 Ford Contour. Believe it or not the ABS and the Blower Motor share the same fuse. It's a yellow 60 amp and you have to take off the battery to get at it. Of course this happened twice in the 6 years I had the car, both times in the dead of winter. Tires Plus in Pennsauken, NJ replaced it. Other than that, no complaints with my Contour.

Posted on Feb 11, 2009

emissionwiz
  • 76673 Answers

SOURCE: heat only when switch is on high

replace the blower motor speed control resistor.

Posted on Mar 06, 2009

  • 1 Answer

SOURCE: My blower motor fan speed switch will work only on High.

I had a similar problem with my 03 Taurus. Does your floorboard on the passenger side get wet when it rains really hard? If so, Ford is aware of a defect above the fan motor which is behind the glovebox.
I contacted Ford directly and they had my local ford dealer fix it free and they gave me money towards a new blower motor which shorted out from the leak, it's possible it just your switch if there is no leak but you might need both the switch and blower motor replaced like I did. Hope this helps.

Posted on Apr 14, 2009

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2 Answers

Blower fan not working


The resistor bank is bad for slow speeds, the switch is bad for high speed. In your test, you have voltage, but the switch wont carry the amps, to run high speed. Open circuits will not blow fuses. Replace both switch and resistor bank for all speeds. Make sure to clean leaves and trash from fan housing and see if fan spins freely.

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you need a blower resister most likely. or the speed control switch. 99 out of a 100 times the resister shot craps

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Heater blower stopped working?


Hello,
You may want to try your fan on all speeds. If it will work on high, you have a bad resistor for the fan motor. ( high speed doesn't go through the resistor ).
If it doesn't work on any speed, I would check the following;
1. Make sure the fuse isn't blown for the fan blower motor.
2. Check, or have checked the wires between the fan control switch and the fan blower motor.
3. Have the fan control switch checked.
4. Have the fan blower motor checked.

I hope this helps you.

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this problem is not caused by the switch, it is caused by a defective blower motor speed control resistor, the resistor is located near the blower motor.

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Last week the heater blower motor stopped working on intermediate speeds and would only work on high. Today after working for a little while on high I lost all speeds of the blower motor. Is it the switch...


resistor for sure, the switch would have caused all speeds to fail as it only has one moving contact but the tapped wirewound resistor is a common part for this fault.

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Sounds like you may have a bad blower motor resistor.  When they go bad, they usually wipe out all speeds except high.  But could knock out just one or two of the speeds.  It should be located near the blower motor.

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it seems like u have either a bad switch or bad blower motor.

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Blower for heater stopped


Remove the hush panel under the dash and unplug your blower motor turn the knob and see if its getting power. If it is replace the blower motor. If your heater seems to work on high but not the other 4 settings. replace the blower motor resistor and pigtail (same general location as blower motor)

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Heater/ac only works on high...and on high it's extreamly noisy


sounds like relay to me but what blew it, most likely dry bearings on blower motor causing your noise clean oil fan motor install relay

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