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
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BLUELIGHTNIN6
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Could you please describe the noise a little bit? Ticking, grinding, hissing etc.. This will be very helpful in diagnosing the problem. Thank you.
Dec 16, 2008 at 2:25 AM