--- title: "U-Line error code Temp Lo 12H+" description: "U-Line error code Temp Lo 12H+: The same as Temp Lo 6H+ and twice as long. Which machines can actually raise it, where the number lives on this make, and" url: "https://ulinemiami.support/error-codes/error-code-temp-lo-12h/" date_modified: "2026-08-30" Appliance type: "Beverage centers, Undercounter refrigerators, Wine coolers" --- # U-Line error code Temp Lo 12H+ ### What Temp Lo 12H+ means, in the maker’s own words The same as Temp Lo 6H+ and twice as long. Twelve hours ten degrees below a wine set point is long enough to have frozen bottles, and that is why the maker separates the two rather than publishing one. On a two-zone cabinet the notification carries (L) or (R) to say which zone it came from; the maker’s own note is that single zone models do not use the left or right indicator at all. ### Quoted rather than interpreted > (L) (R) Temp Lo 12H+ — Left or right zone temperature -10 degrees under set point for over 12 hours. From ERROR NOTIFICATION table, 3000 Series User Guide, in a User Guide & Service Manual downloaded from U-Line’s own site. Nothing on this page is decoded beyond what that sentence says. ### Where this notification actually lives On your display, which on this make is the exception rather than the rule. The 3000 Series does not use the E numbers at all: it watches its inputs continuously and writes the notification on the user interface in plain words, so there is no hidden log to open and no key to hold. Every other U-Line in this catalog does the opposite — it logs the number in memory and shows you nothing but the door. If you are reading a phrase rather than a number, this is the series you own. ### What to do about it - Look at what is inside before you look at the appliance, particularly on a wine cabinet. - Check the set point, and check whether anything on the control has been changed recently. - Inspect the main control for proper relay operation — a compressor relay stuck closed is the failure this notification usually reports. - Then the refrigeration system, against the maker’s System Diagnosis Guide. ### Where this goes next The job this usually becomes is [diagnostic visit](/services/diagnostic-visit/), and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 851-2207](tel:+13058512207) and describe what the display is doing before booking anything. **u line temp lo 12h error** names a notification the 3000 Series puts on the display itself, which is what makes it different from every other number this maker logs. 3000 Series only — this series does not use the E numbers What this one means What Temp Lo 12H+ means, in the maker’s own words The same as Temp Lo 6H+ and twice as long. Twelve hours ten degrees below a wine set point is long enough to have frozen bottles, and that is why the maker separates the two rather than publishing one. On a two-zone cabinet the notification carries (L) or (R) to say which zone it came from; the maker’s own note is that single zone models do not use the left or right indicator at all. Quoted rather than interpreted (L) (R) Temp Lo 12H+ — Left or right zone temperature -10 degrees under set point for over 12 hours. From ERROR NOTIFICATION table, 3000 Series User Guide, in a User Guide & Service Manual downloaded from U-Line’s own site. Nothing on this page is decoded beyond what that sentence says. Where this notification actually lives On your display, which on this make is the exception rather than the rule. The 3000 Series does not use the E numbers at all: it watches its inputs continuously and writes the notification on the user interface in plain words, so there is no hidden log to open and no key to hold. Every other U-Line in this catalog does the opposite — it logs the number in memory and shows you nothing but the door. If you are reading a phrase rather than a number, this is the series you own. What to do about it Look at what is inside before you look at the appliance, particularly on a wine cabinet. Check the set point, and check whether anything on the control has been changed recently. Inspect the main control for proper relay operation — a compressor relay stuck closed is the failure this notification usually reports. Then the refrigeration system, against the maker’s System Diagnosis Guide. Where this goes next The job this usually becomes is diagnostic visit, and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 851-2207](tel:+13058512207) and describe what the display is doing before booking anything. u line temp lo 12h error names a notification the 3000 Series puts on the display itself, which is what makes it different from every other number this maker logs. --- **[Read full article: U-Line error code Temp Lo 12H+](https://ulinemiami.support/error-codes/error-code-temp-lo-12h/)**