Our commercial customer in Stanislaus County, California, reported that one of their freezers was running at high temperatures. After checking in with the manager, our refrigeration technician troubleshooted the system. Determined that the defrost relay had failed, and and unit was low on refrigerant. Traced the leak to the discharge service valve and was able to repair same day. Will source and order the defrost relay ASAP, unit is running at -5* but advised manager not to overstock unit until we return and replace the relay.