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Climate Control Switches

MuffinDog

NAXJA Forum User
Location
Utah
I have a 1990 Cheerokee where the temperature switch will not move all the way over to cold. If I move it over to hot I can hear the vacumn hissing but I never get hot air. I have checked for leaks in the tubes but don't see any problems. Is it the climate control unit that has a problem or could it be something is stuck in the heater core?
 
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