Arrived on, 7/10/23 - Mike A - Arrived on site and inspected unit. Bottom unit control panel high limit is tripping intermittently. Reset and have proper functions. Unit not over temping. Exhaust fan running but getting hot. Will obtain replacement fan and high limit. Unit ok for use but may still trip with having a weak high limit and fan overheating. Returned on, 7/13/23 - Mike A - Arrived on site and installed replacement cooling fan and internal high limit. Tested unit and have proper functions. Also used foil tape to insulate seams of exhaust stack. Unit ok for use