Question about 2003 Nissan Altima

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Vent fan only works when set to 4

My vent fan only works when set to the highest setting (4), otherwise nothing! I am guessing it is a failure of the switch - do I have to remove the whole dash or can I just remove the fan knob panel? Also it seems that even on high sometimes there isn't much heat (although not 100% sure about this - mentioning it just in case). Any help would be appreciated!

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  • deen2 Oct 09, 2008

    Thank you guill ! - I picked up a blower motor resistor from my dealer ($40) and replaced it myself (took around 15-20 minutes - it was hidden behind a black tab underneath the passenger side below the glove compartment a little to the left of center - I could tell it was right based on feeling the position of the two screws which hold it in place and the cable that ran under the tab which plugs into the resistor. There was no need to remove anything to reach it - just tedious to get to it and unscrew it). Now the dial works from 1-4! (although 1 is pretty weak). Thank you again!



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On your Vehicle the problem for the FAN speed is NOT the FAN switch.
99.9 % of this problem on cars is the BLOWER MOTOR RESISTOR.
The blower motor resistor give the speed to the Fan.
But on High speed the switch make a By pass of the switch using a Relay for the high speed.
The Blower motor resistor, is located Beside of the Blower motor On the passanger compartment.

If you replace the blower motor resistor you have 99.9% of this will solve your problem.

I'm a Mechanic.

I hope this help on your problem.
Thank you for use fixya...

Posted on Oct 09, 2008


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