Question about 2003 Dodge Dakota Club Cab

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Fan problem ac/heat fan runs on high speed only so they have to be on high or nothing

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The rheostat for the fan is bad

Posted on Jul 13, 2008

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The only way the AC works is with the fan on high. The climate control does nothing on my '94 Lincoln Town Car


Often when they only run on high, it is the fan switch that needs replacing.
On the lower speeds the voltage runs though some resisters to slow the fan, on high its a direct contact

Aug 06, 2011 | Lincoln Town Car Cars & Trucks

1 Answer

06 Kia Sedona overheats when ac is on. If the ac is off the van will return to normal temps. Had the compressor just replaced and v-belt. Both fans appear to be running when ac is on.


Does the engine over heat or the gauge goes to hot. Really hot. Since the A/C is on , this puts an extra load on the engine. This is why the fans come on when the A/C is turned on. This is usually low speed fan mode. High speed doesn't come on untilll 220 to 230 degrees. Most vehicles. Cars don't over heat untill the gauge gets in the red, when it starts getting close is time to worry and stop. I guess the question to you would be, What does the temp gauge read?

Jul 02, 2011 | 2002 Kia Sedona

1 Answer

My 1996 Plymouth Neon 2.0 DOHC engine is having a overheating issue. When I run the A/C after about 15 minutes the car willstart to over heat and i have to turn it off. Once I turn it off, the guage will...


your car has two fans one for the motor the other for the ac both fans shooed
come on when the ac is on if not try hot wiring the second fan run a pos & neg
wire to it and see if it over heats it sounds like your having trouble with the fan
switch located in the fuse box under the hood

i hope this helps you
bob

Jun 17, 2011 | 1997 Plymouth Neon

1 Answer

Fan only works high speed. For AC compressor runs but no fan other than when switched to high speed at which time the fan runs at high speed but AC switches off.


I have the same problem on my 1999 Jetta have you gotten any responces yet if you do please email me the solution rohintz@gmail.com Thank you Rick

Jun 13, 2011 | 1999 Volkswagen Jetta

1 Answer

The heater/ac fan on my Toyota Highlander only runs on high. When set at any of the lower settings, it is just 'off'. Is this a problem with the circuit panel that controls the entire heating/ac system?


usually when you loose some fan speeds. it is the heater fan resistor. it has differant size coils for each fan sped. if they fail you loose that fan speed. good-luck !

Jan 10, 2011 | Toyota Highlander Cars & Trucks

1 Answer

My 1998 Jeep Wrangler Heater Motor only has one speed High. Nothing on any of the lower ones, no matter on ac or heat. What could be the problem?


This is 100% the Blower (Fan) Motor Resistor located near the Blower Motor.
This is a very common problem with Chyrsler, Dodge, Jeep and Plymouth. The key symptom is the Fan only working on High.
This is very easy to access and replace.

Let me know if this helped....

May 13, 2010 | 1999 Jeep Wrangler

1 Answer

The heating/AC fan only runs on the highest setting on my 2000 Chevy Venture. My 1998 Olds Silhouette (sp?) ran all speeds but high. The fuse box has a seperate circuit for heating/AC fan high vs. the...


There are two types of blower fan speed control. One uses a rheostat, and the other one uses electronic circuits. The speed control is atually located on the blower fan housing. It is fastened with two screws. The rheostat kind uses nicrhome wires(same wire used for heating element such as a toaster etc. The more wire wound around the mica material( anyways a mica is a heatproof material), the greater the resistance and therefore the slowe the motor will turn. The electronic kind uses a transistor, and works very much like the speed control on a cordless power drill. The transistor gets pulse from another electronic device and this pulse is modulated by the control knob in your dash. When this transistor gets messed up it gets shorted. This results in having high speed at all settings. The rheostat kind mess up when the nichrome wire gets burnt out and you end up with may a fan that works only on high, or maybe wroks only on medium and high vice versa. So the problem is the speed control mounted on your blower fan housing. If you want to know how to test them let me knw I will show you.

Aug 12, 2009 | Chevrolet Venture Cars & Trucks

1 Answer

Blower fan only works on high


If it is working at all then the relay and fuse is good and the problem is either the little vacuum hose on the back of the control switch panel or the panel itself.

Feb 01, 2009 | 2001 Chevrolet Silverado

1 Answer

2001 BMW 330i..Fan for AC/vent not working?


it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.

Jan 16, 2009 | 2003 BMW 325

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