Subject: A/C Hot & Cold Vent Problem, 4kq

[C1J1Miller@aol.com]

David wrote:
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While running my A/C, cold air only blows out of the center vents, but
extremely hot air blows out of the side vents.  Any suggestions as to a
fix for this problem?

'85 4kq
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This has been covered earlier this year, and is in the archives on the quattro
list homepage http://coimbra.ans.net/quattro.html.  That said:
your 4kq center vents only blow outside air (i.e., not through the heater
core).  The other side vents go through the core before entering the car.
Thus, your core is still getting coolant heated by the engine.  The valve that
adjusts the amount of hot coolant entering the heater core is located under
the coil, and is controlled by a cable.  My guess is that it is sticky, and
the cable either needs adjustment, or the valve needs cleaning/lubrication (or
replacement).  You can disconnect the wire clip holding the cable to the
heater control valve and adjust it so that the lever on the valve moves
entirely to cold when the inside control lever is so adjusted.  The clip is
stiff and difficult to reattach; I used a pair of pliers.  You may need to
readjust this clip semiannually; in spring to allow full cold, and in fall to
allow full warm.
HTH, chris miller, windham NH, c1j1miller@aol.com
'91 200q      http://members.aol.com/c1j1miller/index.html