2002 Jeep Wrangler no heat

2002 JEEP WRANGLER
121,000 MILES • 6 CYL • 4WD • MANUAL
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KBUSSELL
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The vehicle's heater will not warm up.We replaced the thermostat ( 190) and the engine heats up to 210 to 220 on the gauge , but no heat through the vents.The heat control knob does not make any difference no matter how it's turned

The blower and vent control knobs work fine.
Stumped
Any thoughts?.
Mar 1, 2009 at 8:45 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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