2005 Hyundai Sonata defroster noises

2005 HYUNDAI SONATA
80,000 MILES • 6 CYL • FWD • AUTOMATIC
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CAROLSS
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when i turn on my heater it runs and sounds fine but as soon as i press the defroster button it start making a really wierd noise from the passenger side. if i press any other blower selection the noise stops. The blower works really well on any selection. ????????????????
Dec 16, 2008 at 2:19 AM
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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