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'94 Seville STS
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68 Posts
Discussion Starter #1
I'm hoping that you can help sort out our heater situation. :worship:

When we put the heater on the Defog setting, warm air comes out the by the windshield and the passenger footwell; but cold air comes out by the driver's feet, and the vents for the backseat. :confused:

The Defroster, Economy, and Auto settings seem to get warm air, (with the back seat vents still getting cold air); but there doesn't seem to be any way to get warm air to the driver's feet. :(

Any ideas?
 

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91 Posts
I have a similar thing in my Olds, but that's a 79, so it's all vacuum. It could be a blender door or one of the myriad of electric motors that control the vents in these ever so complicated animals. Sadly I'm not qualified to make a more in depth diagnosis. Maybe someone else will chime in.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,785 Posts
Try flushing the heater core first. If that doesn't work, then start looking at the air distribution doors.
 

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Registered
'94 Seville STS
Joined
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68 Posts
Discussion Starter #4
Thanks guys!

I was thinking maybe the heater core might have some restriction in it, as the warm air that I go get; doesn't seem as warm as it should be. How hard it it to get all the air out of the system after flushing the heater core, and refilling?
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,785 Posts
The Northstar is self purging. Just check the coolant level after you run it once to top it off if need be.
 
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