Question about 1999 Ford Ranger SuperCab

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Heater blower only works on the 2 highest speeds ? Ranger is 2003 4 dr. with factory air

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It could be the blower motor resistor, this is what gives the motor different speeds, they are very common to burn out 1 or 2 speeds. They are not very expensive, I would look into that first

Posted on Nov 19, 2009

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1990 Corolla: Air/heater switch works only when set to the highest speed.


Take it apart and clean it out as much as you can. Cleaner ( like lysol spray?) may help. Take the blower motor out-that should be easy to get to-and clean out that cavity.
It is the resistor pack, not the switch, for the blower speed problem. See if you can take the glove box off or out. Look for the resistor-it is somewhere on the heater case, and easily replaced. Only one or two screws that hold it, and the electrical connector, and it's free.

May 26, 2012 | 1990 Toyota Corolla

1 Answer

The fan speed selector switch control only works on the highest speed. When I put the switch to the lower speeds there is no air, and I can't hear the motor working. It's as if it is off in the lower fan...


Hello Imrevoy.
When this symptom happens your blower motor resistor has gone open circuit.
When on the high fan position it sends full battery power to the fan so it bypasses the resistor.
That's why, now how to repair?
Here's the manual instruction.

  1. REMOVE GlOVE COMPARTMENT DOOR
  2. REMOVE ENGINE ECU
    1. Disconnect the wire harness clamps.
    2. Disconnect the connectors.
    3. Remove the 2 bolts and engine (and ECT) ECU.
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  1. Two way flow heater models only: REMOVE AIR DUCT (Motor cover)
    1. Disconnect the control link.
    2. Disconnect the connector clamps.
    3. Remove the screw.
    4. Release the claw and remove the air duct.

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  1. REMOVE BLOWER RESISTOR
    1. Disconnect the connector.
    2. Remove the 2 screws and blower resistor.

  1. INSTALL BLOWER RESISTOR
  2. Two way flow heater models only: INSTALL AIR DUCT
  3. INSTALL ENGINE ECU
  4. INSTALL GLOVE COMPARTMENT DOOR

There you are, I hope your repair goes well.
Thank you for using FixYa.

KL

Dec 17, 2010 | 2005 Toyota ECHO

1 Answer

Heater fan motor only works on highest 2 speeds. need to know where the fan resister is?


The resistor pack is located behind the glovebox, mounted to the blower motor.

Nov 15, 2010 | 2003 GMC Envoy

1 Answer

05 GMC sierra heater blower stopped working. It used to work on setting 1-4 but lost 4 a couple weeks ago and now none of them work. Is this a bad blower , resistor or both?


The resistor is most likely bad but should still work on the highest setting.Would check pigtails to the resistor and to the blower motor for burnt or discolored wiring.You can try tapping the blower motor and wiggling the wiring harness too see if it will work on the highest setting. It is possible that the blower motor is bad as well typically when you lose the speed selection it is the resistor but you should always have high speed.

Nov 10, 2010 | 2003 GMC Sierra 1500

1 Answer

I have a 2003 Chevy Tahoe . The heater and a/c fan only works on the highest speed #5. How do you repair this problem?


Check the blower motor resistor.It is on the passengers side by the blower motor under the dash.The resistor is connected to the blower motor and controls the blower speeds.They are known for going bad.Also check the connectors because they get hot and will melt.If they are melted then you will have to replace the connectors.You can get these from the dealership.Replace the blower motor resistor too.Hope this helps.Good luck.

Mar 16, 2010 | 2003 Chevrolet Tahoe

1 Answer

2001 Ranger XLT heat and air conditioning only work on high speed


there is a flapor motor that is controled by vacume, check for leaks in the vacume lines on the engine.

Sep 30, 2009 | 2000 Ford Ranger SuperCab

3 Answers

Heater blower motor control speed is not working


Check on the outside/ under the hood. on the passenger side of the firewall there is a flat board whitish in color carfully pull that off and make sure all the connectors look clean this is the cheap way out.

Aug 14, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

Fan switch only works on the two highest settings


the various speeds are controlled through resisters (spring-like in apperance) one of different value for each speed, none for highest speed as the power gets to the blower uninpeeded . the resistor pack should be located on the center of the firewall, held by 2 screws. thats under the hood. where the engine bay ends....

Jul 22, 2009 | 2003 Buick Century

2 Answers

A/C and Heater Only works on the highest speed


The blower motor resister is bad...It is very common in chevy trucks. The resister is located behind the glove box and is held in place by two screws, it will also have a wire harness attached to it. If you want to see a picture of it go to www.partsamerica.com and search for the blower motor resister.

Nov 25, 2008 | 2003 Chevrolet Tahoe

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