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Old 10-28-2011, 08:11 AM   #5
healthservices
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Join Date: Oct 2011
Location: socal
Posts: 1,014
The Blend door is built a little strange, it may for sound deadening? but from what I saw the door is a holey plate with a foam piece covering it. When the foam deteriorates the door can not regulate the hot/cold air anymore as it is bypassing threw the openings.

Removal of the heater box is required to repair this.
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