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Air Conitioning issues

When I turn on the air conditioning, the driver’s side works well, but the passenger’s side vents blow warm air. What could this mean and could I fix it from home?

This car MUST have dual zone climate control… eather your second zone is still set Hot, or your blend door is stuck… You maybe able to get under the dash and manually move the door, and this may get it unstuck. Otherwise you will have to replace the motor or vac actuator (I dont know what powers the door on this car) to get it working again.