driverside hot but pass side cold air

1998 BUICK LESABRE
145,000 MILES
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FLASHPOWERCONTACT
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  • 3 POSTS
i have my heater set to 85 or anything that blows warm air from the driver side, but it blows freezing cold air from the passenger side, the passenger heating control pad on the side even when set to the warmest setting is still blowing freezing air, what could be the problem?
Dec 6, 2011 at 9:16 AM
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FLASHPOWERCONTACT
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i found a blown fuse and replaced it, a blue 15A in section 8A, i started the car and heat started coming from both sides, but the air was blowing from all areas, not just one, it wouldnt switch to mid , floor or windshield, it was coming from all of them, i turned off car and checked fuse again and it was blown again, could this be a short somewhere, how do i fix this.
Dec 6, 2011 at 9:39 AM
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JACOBANDNICKOLAS
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Yes, a short is most likely the issue.
Dec 6, 2011 at 11:32 AM
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FLASHPOWERCONTACT
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how can i find out where it is?
Dec 6, 2011 at 2:06 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Check the blend door actuator.
Dec 6, 2011 at 2:17 PM
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FLASHPOWERCONTACT
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what exactly is that o.O
Dec 6, 2011 at 2:23 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
A blend door is part of the HVAC on your vehicle. Near the heater core, the blend air doors are located. The heater core is hot from engine coolant and the blend air doors open to allow heated air to enter the vehicle. Based on how far they are open determines how much heat you get in the vehicle. If they are closed, you get none.

The blend air door actuator is the device that opens the door to allow air to enter the vehicle. It moves based on the temp requested by the driver. If the actuator is bad, the door will not open and you will not get heat.
Dec 6, 2011 at 2:28 PM
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