I noticed that the living room and kitchen area were kinda warm this afternoon . I could hear the A/C running but it wasn't cooling . I walked by the air return and could hear the blower running but it sounded strange . And there is no air movement thru the grill . The compressor outside is running . Too hot to go up in the attic until later this evening . At least I have another unit for the bedrooms . I'll post my findings later .