Arrived at location on 6/9/21. Spoke to manager about unit. Unit would not turn on when plugged in to outlet. Checked outlet for voltage and found there was nothing reset the GFCI breaker and checked voltage again. Got 120 volts at Outlet plugged unit in and unit still would not start. Checked voltage going to switch and got 120vac when checking across leads but motor still would not start when switch was activated. Swapped switch out with a known working switch. unit immediately turned on as it should and off as it should. I installed a rocker switch from my truck stock. Talked to a restaurant helper josh about unit. Josh made mention that they were spraying water into motor cavity in order to clean it. I also inquired about how the unit is being operated and took notice unit was about 1/3 full of cold dirty oil. Made mention that it needs to be emptied before operating pump and oil to be cycled needs to be hot. unit back in service for now.