Most likely the doors, gotta pull dash probably
>From John's iPhone
On Mar 26, 2012, at 1:05 PM, "Mike & Sharon Higgins" <clearcreek@gobrainstorm.net> wrote:
>
> My brother has a 1998 Durango with a heating problem that just started about
> six weeks ago. His Outside air intake started to allow a lot of air into
> the cab. He thought maybe the heater core was plugged, and brought it to the
> dealer. After $835.00 to change the T-stat, he still had the same problem,
> and a suggestion to replace the heater core. He went through the ordinary
> repairs; e.i., Back Flush the core, check the hose temperature and compare
> in & out. He asked me, and I suggested the he avoid removing the heater core
> unless it was obviously leaking. Does anyone have access to a diagram or
> schematic if the heater box (w/AC)? the next idea is to check the switches
> and doors to determine if one or more is stuck open, and letting in too much
> cold air.
>
> Any other ideas?
>
> Mike Higgins
> 1999 Dakota extended cab 5.2 L w/5 speed
>
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