HVAC air flap stuck open?
kneale at coslink.net
Wed May 31 13:12:34 EDT 2006
My understanding is that the "outside" door is supposed to close during A/C
operation so that you are not drawing warm outside air over the cold
evaporator coils. The "outside" door shares a hinge with the "inside"
recirculation door into the cabin so that when one is open, the other is
closed. When the "outside" door closes for A/C operation, the
recirculation door opens so that already cooled air in the cabin is drawn
over the evaporator coils and can be cooled further.
At 03:59 AM 5/31/2006 +0000, jalexmichaels at netzero.net wrote:
>After looking over various q-list sources, I am confused as to the proper
>operation of the HVAC air intake doors. The "upper" door under the hood and
>wipers appears to remain open no matter what function, including off, is
>set. When is this door supposed to close? Is it also supposed to have any
>sort of debris or particle filter?
>I have started to look around the HVAC system more as there has been an
>increase in fume smells coming from the system. Could this door issue be
>part of the problem?
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