my blower only works on high which is #4 for the heat and air on 2002 Nissan Quest

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this just started blower works only on high #4
(2) Answers
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There is a blower fan resistor pack that has failed easy to replace. $ wires going to it usually under dash near glove box. Autozone have some popular workshop manuals for free on line once you register (for free) on their website They may have a picture/location of the part.