SOURCE: air conditioning only works on high - 2002 Grand Caravan
If you are looking for the fan blower resistor, it is located behind the glove box. No tools need to get to it and a nut driver to remove the 2 screws to replace it. A 20$ part. It has 2 sets of wires coming off of it. A do it yourself fix.
SOURCE: air condition fan only works on high speed, no low speed
You have a bad blower motor resistor. This is located under the dash close to the blower motor itself
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