Interior air mixer changes under load

Tiny
CITYFARMBOY
  • MEMBER
  • 1996 FORD BRONCO
  • 246,000 MILES
Air vent works fine until I accelerate or go up a hill, then air switches to the defroster until load is over. It then reverts back to the air vent setting. Sounds like inadequate vacuum or a vacuum leak, but where?
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Sunday, June 24th, 2012 AT 11:15 PM

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Tiny
SATURNTECH9
  • EXPERT
The diaphram that controls the mode door.
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Sunday, June 24th, 2012 AT 11:29 PM

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