it says it's full when the basket is only half full of ice, keeps stopping early

Diagnosis

The EUHOMY 44Lbs Nugget Ice Maker utilizes an infrared (IR) beam sensor system to detect when the ice basket has reached capacity. This system consists of an emitter and a receiver located on the interior walls of the chassis, positioned just above the rim of the ice basket. When ice piles up and breaks the beam, the machine triggers the "Full" indicator and halts production to prevent ice from overflowing and jamming the dispensing mechanism. The issue of "false positives"—where the machine signals it is full while the basket is only half-full—is typically caused by one of two things: condensation/frost buildup or "ice peaking." Because the interior of the machine is humid, a thin layer of frost or water droplets can form over the IR sensor lens. This refracts the light beam, tricking the sensor into thinking an ice cube is blocking the path. Alternatively, if the nugget ice piles unevenly, a single "peak" of ice can reach the sensor beam even if the rest of the basket is nearly empty, triggering an early shutdown.

How to Fix It

To resolve the sensor malfunction and ensure the machine utilizes the full capacity of the basket, follow these precise steps:

1. Power down the unit completely by pressing the power button and unplugging the power cord from the wall outlet to prevent accidental startup during cleaning.
2. Remove the ice basket and any remaining ice. Use a clean, dry microfiber cloth to wipe the interior walls of the machine.
3. Locate the IR sensor lenses. These are small, clear plastic windows located on the side walls, roughly 2-3 inches above the basket seating area.
4. Carefully wipe these lenses with a dry cloth. If there is stubborn frost or mineral buildup (white scale), dampen the cloth slightly with distilled water, wipe the lens, and then immediately dry it with a lint-free cloth. Any residue left on the lens will cause the sensor to fail again.
5. Check the surrounding area for any stray ice shards or "snow" clinging to the walls near the sensors; remove these manually.
6. Reinsert the ice basket and plug the unit back in.
7. As the machine refills, use the provided ice scoop to periodically level the ice. Ensure the ice is spread evenly across the basket rather than allowing a mound to form in the center, which prevents the "peak" from hitting the sensor prematurely.

If That Didn't Work

• Perform a Deep Descale: If the sensor is clean but the machine still acts erratically, mineral deposits may be affecting the internal temperature sensors, causing the machine to cycle incorrectly. Fill the reservoir with a mixture of 50% white vinegar and 50% water, run the self-cleaning cycle, and then run two additional cycles with plain distilled water to flush the system.
• Adjust Machine Leveling: If the unit is tilted forward or to one side, the ice will naturally pile up against one wall, hitting the sensor while the other side of the basket is empty. Place a bubble level on top of the machine and adjust the surface or use shims to ensure the unit is perfectly level.
• Check for Air Bubbles: Occasionally, air pockets in the water line can cause the ice to form in irregular, oversized clumps that bridge the gap to the sensor. Empty the water reservoir completely, shake the machine gently to release trapped air, and refill with fresh water.
• Inspect the Sensor Housing: Inspect the plastic housing around the IR lenses for any cracks or warping. If the plastic has warped due to heat or cold, the beam may be misaligned. If you see a physical gap or crack, the sensor may need professional replacement.

Heads Up

• Avoid Tap Water: Hard water creates calcium deposits on the sensor lenses and internal tubing. Using distilled or filtered water significantly reduces the frequency of "false full" errors.
• Prevent Ice Bridging: Every 4-6 hours, give the ice basket a gentle shake or stir the ice with the scoop. This prevents "bridging," where ice cubes lock together to form a peak that triggers the sensor.
• Dry the Interior: When performing the self-cleaning cycle, ensure you wipe the interior walls dry afterward. Excess moisture left on the walls during a cold cycle is the primary cause of the frost buildup that blinds the IR sensors.
• Ventilation Clearance: Ensure there are at least 6 inches of clearance around the side vents. Overheating can cause internal condensation to drip onto the sensors, leading to premature shutdowns.