Be more specific, if the fan speed only works on high then it is most cases a bad resistor board for the fan, a $10-20 part, available from an advance, murrays, or lee or similar auto parts store.
If you mean the fan works on high only it's the blower motor resistor.
possibly a high speed blower relay. If the the ac works on all speeds but high, this is my bet. You should be able to pick up a replacement relay at most parts stores.
Assuming that by "high," "low," and "medium" you are referring to HVAC blower fan speed and that this happens with heat as well as with AC: Replace the blower resistor. It's no good.
AC Compressor
AnswerI think it is the switch or the wires. Actually it would most likely be the resistor motor is shot, if the blower motor only blow on high there is no resistance thus it will only work on high.
I've never seen a globe in a Toyota Avalon ac switch. But a new globe can be bought in a map store. Before you install it, be sure you have NORTH on the top.
On most vehicles, it only runs when the temperature is high enough or the ac requires it.On most vehicles, it only runs when the temperature is high enough or the ac requires it.
the ac only works on high the AC blower motor resister is located behind the pass. side kick panel's. just ahead of the door. this only applies to Eddie Bauer's. all others are on the side of the blower motor housing behind glove comportment Eddie Bauer us a solid state type 2"x2"x1" box. if the AC only blows on high the most likely casuse is an open inside the restior.
2001 dodge ram 1500 ac and heater flow regulator switch does not work. works only on defrost. How to fix?
Your fan motor is going out.
Defective resistor pack.
(1) Faulty fan switch -OR- (2) the resistor on the circulating fan has gone bad.