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Old 06-06-2013, 09:59 PM   #2
gmachinz
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Join Date: Jun 2011
Location: Des Moines, IA.
Posts: 4,143
Re: heater ac vacum controls

The achille's heal is the plastic blend door rod attachment-it's held in place by a 7mm machine screw and over time it breaks off the plastic every time-when this happens, you've effectively lost control of the vacuum controls ability to fully open the blend door-if this happens, it defaults to mainly just blowing on the floor and won't be able to do anything through the vents. I recently restored my entire enclosure while I was replacing the heater core. I found a blend door that had one still intatc but it was cracked-so I plastic weld expoxied it in place like crazy now she'll never break! Blend door will always open and close now.
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