With dual climate control, you have two blend air doors. Since you are getting heat on one side of the vehicle, that tells me the heater core is fine. However, it sounds like one of the blend air doors isn't functioning and allowing heat to enter the vehicle. The blend air doors are located near the heater core in the heater box. Check that to see if one isn't working.
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Sunday, November 17th, 2013 AT 3:56 PM