1994 Jeep Laredo Heater Problems

1994 JEEP GRAND CHEROKEE LAREDO
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JEEPRAGAN
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Heater problem
1994 Jeep Laredo V6 Four Wheel Drive Automatic 250000 miles
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My AC does not cool and my heater does not heat. Refrigerant is fine. Blower fan works. Sometimes when I attempt to turn on the AC I hear a screeching sound. Could you help me to diagnose the problem?
Thanks!
Dec 4, 2007 at 2:24 PM
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MERLIN2021
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Is the sound from under the hood? or under the dash?
Dec 4, 2007 at 2:26 PM