[V8] Not enough heat

[Phil and Judy Rose]

At 2:25 PM -0700 2/6/04, Daniel P. Campbell wrote:
>I have a 1993 V8Q and I have a couple of questions.
>
>First.  I have seen several entries about using the Climate Control console
>to get codes and other information from the Climate Control system.  The
>buttons I have read about do not match the buttons I have on the 93.  I am
>assuming there is a difference in consoles.  Does anyone know how to get
>codes from a 93 console?
>
>Second.  My heater motor was squealing so I took it in to be replaced.  The
>wrench suggested I replace the heater core also since I had 145,000 miles on
>the car.  I agreed.  When I got the car back, everything was fine except it
>does not put out near as much heat as it did in the past.  If the temp
>outside is in the 20's or below, the heater never gets the car warmed up
>enough to get the fan off high.

One possibility is malfunction of heater flap-control potentiometer. 
There is a small servo motor that adjusts the heat by closing/opening 
the fresh-air flap. The CC system senses the position of this flap 
control by means of a tiny potentiometer. After about 145K miles 
<grin> the pot gets dirty/worn and the system can't hold at the 
desired position--in my case the flap would dance around and usually 
wind up at full open (read: "damn cold"). One temporary fix was to 
turn the temp up much higher (or somewhat lower)  than desired so the 
pot can operate at a "good" spot. The only longterm fix is to replace 
the whole flap control assembly, which is attached to the blower 
housing on the driver's side. The part costs something like $80 and 
installation it's no more than an hour job. It requires removal of 
the windshield wiper (motor) assembly.

Or it could be something else...

Phil
-- 
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*  Phil & Judy Rose           Rochester, NY  *
*        mailto:pjrose at frontiernet.net       * 
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