--- title: "Not cooling but still running" description: "U-Line not cooling but still running: the most common call on this make and the one with the cheapest answer hiding inside it." url: "https://ulinemiami.support/symptoms/not-cooling-but-still-running/" date_modified: "2026-08-29" Appliance type: "Beverage centers, Convertible freezers, Outdoor refrigeration, Undercounter refrigerators, Wine coolers" --- # U-Line not cooling but still running ### The fastest diagnosis is free and takes ten seconds Look at the degree symbol on the display. If it is flashing rather than steady, the unit is in showroom mode — a demonstration setting that runs the display and the light and switches the refrigeration off entirely. Hold the light key and the power key together for five seconds. Floor models get sold, and units arrive in this mode more often than anyone expects. ### Cold is moved as much as it is made An undercounter U-Line makes cold in one small place and has to move it around a cabinet that is opened constantly. Most calls that arrive as a dead sealed system turn out to be about the moving rather than the making — a fan, a blocked grille, a condenser that has not been touched in six years. That is the cheaper half of the diagnosis and an honest visit starts there. ### The two modes that stop the cooling on purpose Showroom mode runs the display and the light and switches the refrigeration off, so a unit in it looks alive and does nothing. Sabbath mode does the opposite: the display goes dark and everything keeps running. Both are held-button settings, both are enabled by accident, and between them they account for a real share of the calls on this page. Showroom mode Not a failure at all. The maker's own words: the degree symbol flashes, the display is lit, the interior light works and the unit will not cool. It reads exactly like a dead sealed system and it is two keys held for five seconds. A failed zone sensor, and the backup mode that hides it When a thermistor fails, U-Line keeps the unit cooling on a fixed cycle to protect the contents — ten minutes on and forty off on the 2000 Series — and otherwise operates normally. Nothing appears on the display. The cabinet simply never arrives. A condenser that cannot shed heat The maker's own first answer for a unit that is not cold enough. Under a counter, at floor level, in a Miami kitchen, a condenser fills faster than the manual assumes. The evaporator fan Cold made and not delivered. It usually arrives with a noise complaint attached, and the control can be asked to run the fan on its own to prove it. The sealed system Last on this list rather than first, and deliberately. It is the most expensive answer and the most over-diagnosed one, and everything above it is cheaper to rule out. Look at the degree symbol Flashing rather than steady means showroom mode, and the refrigeration is switched off on purpose. Light key and power key together for five seconds. Put your hand on the grille At the bottom of the unit, while it is running. Warm air should be coming out of it. Nothing coming out points at the condenser fan or a blocked grille. Time one full cycle Ten minutes on and forty off, repeating exactly, is the maker's backup mode after a sensor failure rather than a thermostat doing its job. Measure the cabinet, not the display A bottle of water and a thermometer, twenty-four hours, door shut. It is the only number that settles the argument. It hums, it lights up, and nothing is cold What it usually means Running, lit, and warm inside Started after a move or a delivery Everything looks normal except the temperature The fastest diagnosis is free and takes ten seconds Look at the degree symbol on the display. If it is flashing rather than steady, the unit is in showroom mode — a demonstration setting that runs the display and the light and switches the refrigeration off entirely. Hold the light key and the power key together for five seconds. Floor models get sold, and units arrive in this mode more often than anyone expects. Cold is moved as much as it is made An undercounter U-Line makes cold in one small place and has to move it around a cabinet that is opened constantly. Most calls that arrive as a dead sealed system turn out to be about the moving rather than the making — a fan, a blocked grille, a condenser that has not been touched in six years. That is the cheaper half of the diagnosis and an honest visit starts there. The two modes that stop the cooling on purpose Showroom mode runs the display and the light and switches the refrigeration off, so a unit in it looks alive and does nothing. Sabbath mode does the opposite: the display goes dark and everything keeps running. Both are held-button settings, both are enabled by accident, and between them they account for a real share of the calls on this page. ### It was fine until we moved it. Two things happen during a move. A unit laid on its side wants several hours upright before it runs again, and a floor model bought from a showroom often arrives still in showroom mode. Check the second first — it costs nothing. ### The compressor is running constantly. Is that bad? Not on its own. These cabinets run long cycles in a Miami kitchen, and the 5 Class varies its compressor speed rather than switching on and off. Constant running with a cabinet that is cold is normal; constant running with a cabinet that is not is the page you are on. --- **[Read full article: Not cooling but still running](https://ulinemiami.support/symptoms/not-cooling-but-still-running/)**