Examined unit. Found water pouring out of overflow. Traced problem to drain blocked. Pulled drain down, found drain valve and 2 inch copper drain blocked completely. Cleaned out drain valve and reassembled unit. Ran through clean cycle. Unit has 7in floor drain 1-1/2 deep 1-12 drain. Unit has 3 inch drain over splashing drain when draining. 12-9-16 Examined unit. Found with grease removed from drain, unit draining faster and mixing valve adding more water and floor drain 7in across 2in deep with 1-12 pipe connected to it. Installed 4in by 2in fernco fitting. Ran unit through wash. Unit drained. Tested good. No water coming over drain.