exhaust smell in defrost

2001 SUBARU OUTBACK
21,600,000 MILES • 4 CYL • AWD • AUTOMATIC
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JASON29
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when i turn on my defrost it smells like gas or exhaust, what could cause this.?
Dec 6, 2010 at 6:26 PM
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DOCFIXIT
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Maybe heater core leaking coolant. does windshield get fogged ?
Dec 6, 2010 at 6:36 PM
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JASON29
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No...and it heats great it just smell real bad. its mainly when i first start it and let it warm up.
Dec 6, 2010 at 7:01 PM
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DOCFIXIT
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Have to say and exhaut leak or oil on manifold that is being drawn in air intake try putting HVAC in Recirculation mode
Dec 6, 2010 at 7:27 PM
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JASON29
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that makes sense...ill try it.
Thanks again
jason
Dec 6, 2010 at 8:21 PM