Arrived at location on 8/5/21 - Evaporator was iced up and fans not running. Located UNMARKED WALK INN FREEZER condenser on the roof and put unit into defrost, Checked heaters and time clock. Clock was moving freely and seemed to be operating properly. Unit pumped down properly and contactor is ok. Removed remaining ice build up and started unit, fans would not come on so I checked power and found bad defrost termination switch. Once replaced fans came on once evap temp was low enough. System is operating properly at this time.