2002 dodge truck fan and a/c does not work at low three speeds.Fuses and...

[JonathanR]

a similar thing occured to me but the opposite way, turns out for me it was a faulty fan under the hood

[MartinP]

Hey there


The most likely problem of your vehicle is a Blower motor resistor. I'm not exactly sure sure where it is located but it should be somewhere near the blower motor. It costs about $15 and it's very easy to replace.
Martin

[PaulH]

...relays have been checked in fuse box.? Fan only works on high speed. Same for a/c. Fuses and relays have been checked.

[t]

Maybe a accessory belt problem, sounds like its not moving at low speeds so something wrong with linkage or something. Look to make sure they are moving at idle. Doubt its electrical.