A/C only works on setting 4 on 1993 Nissan Altima

when i got the car, setting 3 & 4 was working. a month later now only setting 4 works. i can hear the a/c compressor kick on when it's on setting 1,2,3. but no air is being blown out..what's the problem

by in Lahaina, HI on March 03, 2010
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
3 answers
ANSWER by , March 03, 2010
If the fan motor only works on high then the fan motor resistor is bad and needs replacement
ANSWER by , July 06, 2010
it could also be a bad fan speed switch
ANSWER by , July 07, 2010
I agree with GetrDone, it is the resistor that have gone on positions 1 & 2. The resistor pack (which all of the resistors reside for the blower) sits next to the blower motor. Here is a link sample of the resistor pack http://www.partsgeek.com/catalog/1993/nissan/altima/climate_control/blower_motor_resistor.html. Extremely rare for the switch goes bad.