Complaint: Wine cooler not keeping temperature. Showing AL. Overnight low was six below. I turned on unit and found pile of ice forming at evaporator and let. Appears low on Freon. I went up to roof. I blocked outdoor coil to simulate warmer day. Conditions with coil blocked: amp draw: 7.1A. Liquid line: 58. Suction line: 45. Unit was not able to keep up with extreme cold ambient temperature. Also, system may be low on Freon or have a Freon restriction. Cannot tell with current conditions. Suggestions: system may need a low-ambient kit to keep pressure is high enough during extreme cold weather. Need to check with manu. about low ambient kit recommendations. Freon pressures need to be checked under warmer conditions. Over 60 Fahrenheit.