A:Answer For model LRONC0705V the defrost process has a defrost button on the temperature knob. It is necessary to regularly defrost your refrigerator in order to ensure efficient operation. The frost on the surface of the evaporator should not exceed 1/4 inches (6 mm) before defrosting. To defrost, press the defrost button (blue button). Remove food from around the evaporator before starting the defrosting operation. Once defrosting is complete, the defrost button will return to its normal position automatically. If the frost on the surface of the evaporator exceeds 1/4 inch (6 mm), check and empty the drip tray after defrosting. Open with a screwdriver. Remove and empty the drip tray, dry it off and reassemble it. ^Daphane