Arrived at location on 7/13/21 - Found vat empty, with large amounts of debris in valve, cleared debris and cycled valve found ball valve is misaligned and will need valve and actuator replaced. Cycled shut and verified oil leaks. Returned to location on 7/16/21 - Replaced drain and actuator for right vat, ensured proper cycling filled and verified no leaks, let heat to temp cleared debris in bottom. Unit is operating correctly at this time.