a/c blows hot air out front vents, cold out rear vents. Can i fix this? Not too expensive way?
You might have a stuck blend door in the front. Usually that is due to a blend door actuator failing. That can be a labor-intensive job to replace as it often means loosening or removing the dash. Some car models have easier access to the blend door, and some are nightmares. Google "blend door actuator" for your make/model/year of vehicle to see what they are and how to fix, sometimes people find a shortcut to replace them without ripping out the dash. (disclaimer: your problem may not actually be a blend door actuator, this is just a guess based on your post)
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