A&Q about 350Z
Q:
I have a 1999 Nisssan Altima and all of a sudden the air conditioning will only work when I set the blowers on the top output. The range is 1-4 (4 being the most air coming out)...my a/c only works when I have it on 4. This waste and I'm freezing...anyone ever hear of a problem like this?
A:
The resistor circuits (3 resistors on a replaceable module) have gone bad. Usually, the lower fan speeds are obtained by running the positive power to the fan through one or more electrical resistors which cuts voltage and produces a lower fan speed. The highest fan setting in 12 volts, with no resistors. Therefore, when the resistors go bad, only the fastest speed works.
Usually, this module is easily replaced, and is often found on the passeger side of the car, under the dash or in the engine compartment. Try posting in the Nissan section to find the exact location.
The replacement part is likely only available through the dealer.
A:
Thanks for the information...quite helpful.