Not enough information. A photo may help. Is this an exterior wall or interior wall ?
But on the information provided, makes me wonder if the hood exhaust is running through a rectangular duct inside the wall. But even if the duct is blocked, it does not fully make sense. Around the cabinet, are you sure the air is blowing OUT, and not INTO the gap?
But on the information provided, makes me wonder if the hood exhaust is running through a rectangular duct inside the wall. But even if the duct is blocked, it does not fully make sense. Around the cabinet, are you sure the air is blowing OUT, and not INTO the gap?