--- title: "True clear ice maker showing E1: evaporator thermistor" description: "What E1 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-e1/" --- # True clear ice maker showing E1 On True's 15-inch clear ice models, E1 is thermistor 1 failure. ## What E1 actually means. On True's 15-inch clear ice models, E1 is thermistor 1 failure. That thermistor sits on the evaporator outlet tube and ends the harvest; E1 means the probe has a bad or loose connection, so the unit cannot time harvest correctly. True Residential ice maker display What to do when E1 shows on the ice maker ### Kind of code Temperature sensors The control lost track of how cold the ice mold or the ice compartment is, because a thermistor reads nonsense or its wire lost contact. Without that reading the ice maker cannot tell when a batch is frozen, so it stops or harvests at the wrong time. Frost packed around the sensor and a loose plug are checked before the sensor itself is changed. ### Usually leads to Ice maker control and sensor repair The control board, the thermistors, the bin sensor and the wiring that decide when an ice maker fills, freezes and stops, tested and repaired when a light flashes, a code shows, a breaker trips or the ice never stops coming. ### Shows up as No Ice Coming From the Ice Maker The mold sits empty or holds one frozen batch that never drops, the bin stays bare for days, and the dispenser gives water as usual: an ice maker not making ice while the rest of the appliance carries on normally. ### Make True Residential True Residential undercounter ice maker repair, from a slow harvest to water that will not drain. ### Source True ADA-height 15-inch TRUE ICE (TUIADA-15-D) install guide (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 E1 on its ice makers. Follow it to the end: the last card says whether this is a visit. 01 Write down E1 and the model and serial numbers. 02 Turn the unit off with the power button to stop further cycles. 03 Book a visit; True's action for E1 is to contact a service company. ### Still there? It usually turns into [ice maker control and sensor repair](https://icemakerrepair.center/services/ice-maker-control-and-sensor-repair/). Book with the code and the model number. ### What not to do E1 on this model is not a water or drain problem. It concerns the probe that tells the control when a harvest is done. ## What you may notice with it. The ice maker problems E1 tends to arrive with. Answer these at the ice maker before anyone is booked. [All problems](https://icemakerrepair.center/problems/) Before you call ### [No Ice Coming From the Ice Maker](https://icemakerrepair.center/problems/ice-maker-not-making-ice/) [All 7 causes, cheapest first](https://icemakerrepair.center/problems/ice-maker-not-making-ice/) It also comes with - [**Ice Clumped or Frozen in the Bin**](https://icemakerrepair.center/problems/ice-clumped-or-frozen-in-bin/) - [**Ice Maker Error Code**](https://icemakerrepair.center/problems/ice-maker-error-code/) Problem ### No Ice Coming From the Ice Maker 7 causes, cheapest first Where E1 usually leads ## Ice maker control and sensor repair. **Control board, thermistor or bin sensor · moderate to highest.** Book a visit [What the job involves](https://icemakerrepair.center/services/ice-maker-control-and-sensor-repair/) ## 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/) [E2](https://icemakerrepair.center/error-codes/true-e2/) [hot GAS](https://icemakerrepair.center/error-codes/true-hot-gas/) [Lo t1](https://icemakerrepair.center/error-codes/true-lo-t1/) [hi PSI](https://icemakerrepair.center/error-codes/true-hi-psi/) [Lo t2](https://icemakerrepair.center/error-codes/true-lo-t2/) Temperature sensors on other makes [Bertazzoni EE](https://icemakerrepair.center/error-codes/bertazzoni-ee/) [Kenmore Er IS](https://icemakerrepair.center/error-codes/kenmore-er-is/) [LG IS](https://icemakerrepair.center/error-codes/lg-is/) [Samsung 8E](https://icemakerrepair.center/error-codes/samsung-8e/) [U-Line E1](https://icemakerrepair.center/error-codes/u-line-e1/) [Viking NO WATER and DRAIN lamps blinking](https://icemakerrepair.center/error-codes/viking-no-water-and-drain-lamps-blinking/) [All 14 codes of this kind](https://icemakerrepair.center/error-codes/#family-sensor) 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 > Thermistor 1 is located on the evaporator outlet tube and is [True ADA-height 15-inch TRUE ICE (TUIADA-15-D) install guide (true-caliber.com PDF)](https://true-caliber.com/wp-content/uploads/2022/10/829074_TUIADA-15-D_Install-Manual_REV_E_EN.pdf) [True ADA-height 15-inch TRUE ICE (TUIADA-15-D) install guide (true-caliber.com PDF)](https://true-caliber.com/wp-content/uploads/2022/10/829074_TUIADA-15-D_Install-Manual_REV_E_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 E1 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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Write down E1 and the model and serial numbers. If it comes back, it needs a visit. ### What does E1 mean on a True ice maker? Thermistor 1, on the evaporator outlet tube, has failed or has a loose connection. The control uses it to end each harvest. ### Can I keep running my True with E1 showing? True's guidance is to contact a service company. Without the harvest probe, cubes may not release properly. ### Is E1 on a True the same as E2? No. E1 is the evaporator probe that ends harvest; E2 is the condenser probe that cycles the fan. --- **[Read on the site: True clear ice maker showing E1: evaporator thermistor](https://icemakerrepair.center/error-codes/true-e1/)** **[Book a visit with IceMakerRepair.center](https://icemakerrepair.center/schedule/)**