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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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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 3 Answers

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
  • 79865 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
  • 79865 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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The blower motor in my 2003 hyundai tiburon has stopped working. I thought it was just the switch because it only worked on the high speed, but mechanic says its probably resistor and/or motor.


The burnt wire's ,are they in the connector that plug's to the control switch ? High resistance ,loose fit cause's this . If the motor works on high the switch isn't the problem , The blower motor resistor is . On high the power flow bypasses the blower motor resistor to ground . Do you know what a blower motor resistor is ? The switch just supply's a path to ground through the different resistances to create different speeds. Your switch probably is not bad . But rather then guess use a ohm meter an test it. Do you know what a wiring diagram is ?
Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size ! Under system click on HVAC ,then under subsystem click on HVAC control's .Click the search button then the blue link . Here watch this video . Blower Motor Problems Auto Repair Help Your blower motor circuit is a little different . Learn to test an not guess or take it to a qualified repair shop.

Nov 08, 2017 | Hyundai Cars & Trucks

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.

May 17, 2017 | Cars & Trucks

1 Answer

Blower stays on after key is removed, now a/c works in front once I hit the highway.


Which of these systems does your vehicle have ?
HVAC Systems - Automatic
Blower Motor Control Processor
The blower motor control processor controls the speed of the blower motor by increasing or decreasing the voltage drop on the ground side of the blower motor. The HVAC control module provides a voltage signal to the blower motor control processor over the blower motor speed control circuit. As the requested blower speed increases, the HVAC control module increases the amount of time that the speed signal is modulated to ground. As the requested blower speed decreases, the HVAC control module decreases the amount of time that the signal is modulated to ground.

HVAC Systems - Manual
Air Speed - Front Control
The blower motor forces outside air into the vehicle's interior. The vehicle operator determines the blower motor's speed when the driver places the blower switch in one of 5 blower speeds. The blower motor will always operate in any switch position other than OFF, as long as the ignition switch is in the RUN position. The blower motor and mode switches are located within the HVAC control module. The blower motor OFF input is connected in series with the HVAC control module by the off blower motor control circuit.
Depending upon the selected speed, power is provided to the blower motor from either the ignition 3 voltage or battery positive voltage circuits from the fuse block. The battery positive voltage circuit only provides power when the High blower switch position is selected. Power and ground are provided to the HVAC control module by the ignition 3 voltage and the ground circuits.
Low Blower Speed
When the Low 1 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the low blower motor control circuit. Voltage is divided between 4 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
Medium Blower Speeds
When the Medium 1 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 1 blower motor control circuit. Voltage is divided between 3 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
When the Medium 2 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 2 blower motor control circuit. Voltage is divided between 2 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
When the Medium 3 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 3 blower motor control circuit. Voltage is divided between a series resistor, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
High Blower Speed
When the High blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the high blower motor control circuit. The voltage energizes the blower relay, causing the blower motor to be connected directly to the battery positive voltage circuit. The blower motor and blower motor relay are grounded through the ground circuit.

HVAC Control Module
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal. The control module supports the following features:

Feb 09, 2018 | 2005 Chevrolet Tahoe

2 Answers

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.

Feb 03, 2011 | 2002 Buick Rendezvous

2 Answers

Need to change fan motor control switch? Only works on high setting.


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.

Sep 22, 2010 | 2003 Mercury Grand Marquis

2 Answers

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.

Jan 13, 2010 | 1995 Chevrolet C1500

1 Answer

Heat blower fan not working


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

Feb 26, 2009 | 2000 Oldsmobile Intrigue

1 Answer

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)

Jan 31, 2009 | 2004 Chevrolet Silverado 2500HD

2 Answers

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

Dec 27, 2008 | 1996 Chevrolet K1500

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