From what I researched Service means long time running of unit. I checked condenser coil, was not that bad i cleaned it off anyway. Turned unit on and off to reset service icon, it worked. Also customer says he has top set at 38 and sometimes freezes cans of sprite. now i check the temp of box and temp it says they are right on the money. bottom drawers are set at 40 no problems with bottom. Sub zero wants you to pay to download service manuals, Just wanted to know if anything else causes it to say service?