That crap is probably saw dust left over from construction. I had to open my AC housing to fix a water leak and vacuumed a bunch of sawdust. I also vacuumed the return air ducts....
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Butch and Kathy
2016 3160RL Legacy, Sailun S637, Centramatic Balancers, 2-T105s, Amish Refrigeration, ARPrv, SoftStartRV, FlexArmor roof
2016 F350 6.7L SRW
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