WHY IS FOAM BLOWING OUT A/C VENTS
Its the foam insulation that surrounds the recirculation flap (which is located in the housing underneath your cabin filter in the rain tray). It degrades over time and will either come shooting out through your vents or it will fall into the fan wheel in the same housing making a weird noise at high fan speeds. The fix is to deal with and vacuum the foam up every now and then or take apart the whole dash to replace the seals for the whole a/c unit.
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