Heat Less in the Carolinas

[Kneale Brownson]

If I remember correctly, the default position for the heater valve is open
and it only "works" under vacuum to close while the A/C is in use.  So if
the vacuum line isn't working, the heater valve should still be allowing
hot coolant through.

At 08:03 PM 12/3/2005 -0500, PeterBergin at aol.com wrote:
>Assuming you have checked the usual suspects, (motor temp in operating range 
>and full radiator).  I would look at the heater control valve at the back of 
>the motor.  It basically opens and lets warm water through the heater core 
>when 
>called for.  If memory serves me correct it is vacuum operated.
>
>Pete
>91 Avant
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