--- title: "True clear ice maker showing Lo t1: evaporator got cold too fast" description: "What Lo t1 means on True clear ice makers, what to check before booking, and when it is not a failure at all." url: "https://icemakerrepair.center/error-codes/true-lo-t1/" --- # True clear ice maker showing Lo t1 On True's 15-inch clear ice models, Lo alternating with t1 means the evaporator thermistor fell below 14°F (-10°C) within the first 5 minutes of the freeze. ## What Lo t1 actually means. On True's 15-inch clear ice models, Lo alternating with t1 means the evaporator thermistor fell below 14°F (-10°C) within the first 5 minutes of the freeze. True links it to the water pump sprays or spray nozzles, since without water flowing over the molds the evaporator chills too quickly. True Residential ice maker display · also shown as Lo, t1 What to do when Lo t1 shows on the ice maker ### Kind of code Ice making and harvest The ice maker froze a batch and could not release it, or the harvest never started: the ejector arm or the twisting tray stalled, the mold heater did not loosen the cubes, or the arm that senses a full bin reported the wrong thing. Ice jammed against the arm and a bin pushed in crooked are cleared first; a motor module or a whole ice maker assembly comes after. ### Usually leads to Ice maker assembly replacement A new ice maker module fitted in the freezer compartment or the door compartment, after the water, the temperature and the bin sensor have been proved good, so the new part is not blamed for an old problem. ### Shows up as Ice Maker Making Small or Hollow Cubes The ice maker making small cubes, thin crescents, hollow shells with water inside or fragments that break apart in the bin tells you the mold is not getting a full fill. ### Make True Residential True Residential undercounter ice maker repair, from a slow harvest to water that will not drain. ### Source True 15-inch TRUE ICE (TUI-15-D) install guide, Electronic Display Codes (true-caliber.com PDF) True Residential 15-inch clear ice models (TUI-15-D, and the ADA-height TUIADA-15-D). The letters are read from the display images in True's guide and quick reference sheet; the display alternates the two words. ## Before you book, in this order. Each step comes from True Residential's own guidance for Lo t1 on its ice makers. Follow it to the end: the last card says whether this is a visit. 01 Turn the unit off and check that the spray nozzles are not clogged with scale. 02 Run the automatic clean cycle if scale is visible or the cleaning reminder is on. 03 If Lo t1 returns with clean nozzles and the pump spraying, book a visit. ### Still there? It usually turns into [ice maker assembly replacement](https://icemakerrepair.center/services/ice-maker-assembly-replacement/). Book with the code and the model number. ### What not to do Lo t1 is not a sign that the room is too cold. That is Lo t2, which reads the ambient temperature. ## What you may notice with it. The ice maker problems Lo t1 tends to arrive with. Answer these at the ice maker before anyone is booked. [All problems](https://icemakerrepair.center/problems/) Before you call ### [Ice Maker Making Small or Hollow Cubes](https://icemakerrepair.center/problems/ice-maker-making-small-or-hollow-cubes/) [All 6 causes, cheapest first](https://icemakerrepair.center/problems/ice-maker-making-small-or-hollow-cubes/) It also comes with - [**Cloudy or Discolored Ice**](https://icemakerrepair.center/problems/ice-cloudy-or-discolored/) - [**No Ice Coming From the Ice Maker**](https://icemakerrepair.center/problems/ice-maker-not-making-ice/) - [**Ice Maker Error Code**](https://icemakerrepair.center/problems/ice-maker-error-code/) Problem ### Ice Maker Making Small or Hollow Cubes 6 causes, cheapest first Where Lo t1 usually leads ## Ice maker assembly replacement. **Ice maker module, mold or twisting tray · moderate.** Book a visit [What the job involves](https://icemakerrepair.center/services/ice-maker-assembly-replacement/) ## True Residential ice makers. True Residential undercounter ice maker repair, from a slow harvest to water that will not drain. [True Residential ice maker repair](https://icemakerrepair.center/brands/true/) More True Residential codes [drn Err](https://icemakerrepair.center/error-codes/true-drn-err/) [LnG FiL](https://icemakerrepair.center/error-codes/true-lng-fil/) [LnG ICE](https://icemakerrepair.center/error-codes/true-lng-ice/) [E1](https://icemakerrepair.center/error-codes/true-e1/) [E2](https://icemakerrepair.center/error-codes/true-e2/) [hot GAS](https://icemakerrepair.center/error-codes/true-hot-gas/) [hi PSI](https://icemakerrepair.center/error-codes/true-hi-psi/) [Lo t2](https://icemakerrepair.center/error-codes/true-lo-t2/) Ice making and harvest on other makes [Bertazzoni EO](https://icemakerrepair.center/error-codes/bertazzoni-eo/) [Café CI](https://icemakerrepair.center/error-codes/cafe-ci/) [GE Profile CI](https://icemakerrepair.center/error-codes/ge-profile-ci/) [GE CI](https://icemakerrepair.center/error-codes/ge-ci/) [Kenmore Er It](https://icemakerrepair.center/error-codes/kenmore-er-it/) [LG It](https://icemakerrepair.center/error-codes/lg-it/) [Monogram CI](https://icemakerrepair.center/error-codes/monogram-ci/) [Samsung 39E](https://icemakerrepair.center/error-codes/samsung-39e/) [All 19 codes of this kind](https://icemakerrepair.center/error-codes/#family-harvest) True Residential builds this ### Freezer ice maker The ice maker that sits inside the freezer compartment itself, a tray that twists or a mold with a heater and an ejector, dropping cubes into a bin or drawer you open by hand, with no dispenser on the door. True Residential builds this ### Undercounter ice maker A built-in residential ice maker that lives under a kitchen, bar or basement counter, making clear cubes or chewable nugget ice on its own cooling system, with a water line in and a gravity drain or a small drain pump out. ## In True Residential's own words > Evaporator thermistor fell below 14° F [True 15-inch TRUE ICE (TUI-15-D) install guide, Electronic Display Codes (true-caliber.com PDF)](https://true-caliber.com/wp-content/uploads/2021/12/829867_TUI-15-D_Install-Manual_REV_I_EN.pdf) [True TUI-15-D Quick Reference Sheet, technical service bulletin (true-caliber.com PDF)](https://true-caliber.com/wp-content/uploads/2023/05/856845-E429-TUI-D-quick-reference-sheet_REV_B_EN-corrected.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. True Residential 15-inch clear ice models (TUI-15-D, and the ADA-height TUIADA-15-D). The letters are read from the display images in True's guide and quick reference sheet; the display alternates the two words. ## True Residential Lo t1 ice maker repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Turn the unit off and check that the spray nozzles are not clogged with scale. If it comes back, it needs a visit. ### Why does my True ice maker show Lo and t1? The evaporator got very cold very early in the freeze, which usually means water is not spraying over the molds properly. Clogged nozzles are the first suspect. ### Can scale cause Lo t1 on a True clear ice maker? Yes. Scale that blocks the nozzles cuts the spray. True's water quality setting and regular descaling help prevent it. ### What is the difference between Lo t1 and Lo t2 on a True? Lo t1 concerns the evaporator and the water spray. Lo t2 means the room around the unit is too cold. --- **[Read on the site: True clear ice maker showing Lo t1: evaporator got cold too fast](https://icemakerrepair.center/error-codes/true-lo-t1/)** **[Book a visit with IceMakerRepair.center](https://icemakerrepair.center/schedule/)**