Re: 1988 k2500 defrost problem
Thanks, ChevyTech. The actuator you refer to seems to be working properly. For the floor heat, the floor door is open and the dash door is closed. When I select the vent position, the floor door closes and the dash door opens. When I select defrost both these doors close, I'm assuming to direct the air to the top vent. Is there a third door in the system I can't see? If so, from where can I access it? I can hear the air trying to escape at the floor because it can't get out up top.
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