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Fan works only on high. The two lower settings do not work.

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Blower motor needs to be replaced or A/c Filter needs to be replaced.

Posted on Aug 07, 2010

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Have a 2009 Nissan Quest I can't turn the heat off. Just stays on a high level of blowing out heat .


If you have a fan that has different speed settings (1234, or low med high etc) and the only one that works is high - then the blower resistor pack has failed. If you have a climate control unit (where you just pick a temp you want) then the fan is controlled by the heating system and it sets fan speed. If you have climate control style try lowering the temp to a lower setting (current temp in vehicle) and see if fan slows down. If not then climate control unit or fan resistor bad. If dial type and you get nothing on lower settings (only high works like mentioned above) you need to change blower resistor. It is located under dash near the fan itself. Look for small unit bolted in duct near fan with wire plug going to it.

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Fan control switch only works on high


If you blower fan will only work on high know that most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings. First check the fuse and change if needed. If that doesn't fix things change the resister.------------------------------------------------------------------------------------
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1 Answer

Heater fan only works on high


Replace the step switch, the contacts are burned out or just use it on high until that speed doesn't work...your choice..

Dec 31, 2012 | 2000 Buick Century

1 Answer

97 Jeep Grand Cherokee fan switch works part time.


Probably the switch. Could be the blower resistor.
On most models the high position bypasses the resistor which cuts down voltage for lower speeds.

Jul 06, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

A/c& heater control fan only works on #4 setting


If the blower motor only works on high speed then the blower motor resistor has burnt out on the lower settings, and will only send power on the high setting because it is straight battery power.

Jul 20, 2011 | 2004 Hyundai Elantra

1 Answer

Fan switch only works on high


It is very likely that the blower motor resistor has burned out. The resistor uses several resistors to drop voltage which drops the fan speed. Since high speed requires no drop in resistance it bypasses all the resisitors. Since none of the lower speeds work I would belt that the resistor for the setting just under high speed has burned out out. since all the other lower speeds use that resistor. Sometimes they will also have a non-serviceable internal fuse that will blow.

Sep 28, 2010 | 1998 Mercury Mystique

1 Answer

The heater in my 2002 Dakota works only at the very highest setting. There is no power at the lowers settings. The defrost light doesn't come on until that setting also, so definantly no power. When turned...


I'm assuming you mean the fan only works on high. If that's the case the blower motor resistor is bad. When the fan switch is on high it puts a full 12Volts to the blower motor. When you have the switch in any other possition, the voltage is routed through the resistor and reduced thus making the motor run slower.

Dec 14, 2009 | Dodge Dakota Cars & Trucks

1 Answer

My fan/blower won't run on high setting. It works


Replace relay under blower motor, under hood.

Jun 25, 2009 | 1993 Buick LeSabre

1 Answer

The front and rear fan blower guage will only run on high.


it could be a bad switch a bad fuse or motor going bad most likely bad switch

Jan 02, 2009 | 2001 Dodge Grand Caravan

1 Answer

2005 jeep grand cherokee 4.7 Ac fan lost the 3 lower settings, only the high setting still worked. For a while the lower fan settings would just come on, and then go out again. The high fan setting...


Well, the blower resistor handles the lower speeds and the hi-blower relay handles the hi speed only. if the fan still works on the lower speeds then the resistor is bad. if the fan doesn't work at all then your motor has failed and or burn't the relay out also. if you can get your blower to start by hitting the kick panel above the pass. side foot area then the motor is bad. if you are handy enough to drop the kick panel and access the motor then check the connections at the motor. Then wack the motor and see if it comes on then. you will most likely find the problem if you follow those simple rules above. Good luck.

Jul 31, 2008 | 2001 Jeep Grand Cherokee

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