Question about 1997 Jeep Cherokee
We replaced the thermostat on the jeep but it still blows cold air. The blower works great....a/c works...no heat.
Verify that the hot water is being circulated thru the heater core by letting the car warm up to operating temp and carefully touching both heater hoses at the firewall where they enter the core. If you are sure that the water is flowing, the the blend door inside the ventilation housing is either not working, stuck, or not getting vacuum. This door directs the air to or away from the heater core depending on the temp control knob position. The system is activated by vacuum pressure, check all vacuum hoses from the engine to the firewall and also underneath the dash on the passenger side behind the ash tray.
Posted on Dec 14, 2008
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