my car will not give me heat unless i put it up to the 3-4 dial how come? on 2002 Buick Rendezvous

also along with that i never really get any cool air since ive had it.....so i roll my windows down because i know itll cost me a pertty penny!! to fix... so what do you think it may be? thxs

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1 answer 1 comment
THIS COULD BE ANYTHING FROM A RESISTOR TO BLEND DOOR PROB OR EVEN FREON ISSUE W/ A/C. GET A PROPER DIAG B4 YOU START THROWING PARTS AT IT
thanks for the info ill do that, and thanks for your quick response to my question. have a good day.