A system for cleaning a commercial food or beverage refrigeration unit may include: a liquid tank; a pump; a vacuum recovery tank; a vacuum motor assembly; a spray wand; a drain stopper; and a suction tool. The refrigeration unit may include a rack, a tray, a fan, a fan housing, a fan power cord, a fan housing power outlet, a coolant, a coolant coil, a pan, and a drain. A method of cleaning the refrigeration unit may include: filling the liquid tank; rinsing the rack by spraying liquid onto the rack; removing the rack; rinsing the tray by spraying liquid onto the tray; removing the tray; stopping the fan; stopping the flow of the coolant; positioning the drain stopper; elevating the fan housing; rinsing the coil by spraying liquid onto the coil; positioning the suction tool on the pan; and vacuuming soil and sprayed liquid into the vacuum recovery tank.