ice maker makes a loud grinding noise when it's trying to harvest ice, sounds awful.

Diagnosis

The loud grinding noise during the harvest cycle in the Aeitto 26lbs/24H Ice Maker is caused by mechanical resistance between the evaporator fingers and the ice cubes. In a healthy cycle, the machine uses a brief heating element or a timed pause to allow the ice to "slip" off the aluminum rods. When the ice adheres too strongly to the metal—often due to mineral buildup or improper temperature calibration—the motor attempts to rotate the auger against a solid block of ice. This creates a high-torque struggle where the plastic gears of the drive assembly grind against one another, producing a harsh, metallic, or rattling sound. You can confirm this by listening for the noise specifically when the machine transitions from the "freezing" phase to the "dropping" phase. If the noise is accompanied by a slower-than-usual drop rate or ice cubes that appear deformed or "shaved," the auger is physically fighting the ice rather than gliding through it.

How to Fix It

To resolve this and reset the mechanical alignment of the auger, follow these precise steps:

1. Immediately unplug the unit from the wall outlet to prevent the gear motor from stripping its teeth.
2. Remove the ice basket and dump all remaining ice.
3. Perform a "Deep Thermal Reset": Leave the machine unplugged and the lid open for a minimum of 8 to 12 hours. This ensures that any "ice bridges" (hidden ice blocks behind the evaporator rods) are completely melted.
4. While the machine is thawing, clean the interior reservoir with a solution of 2 tablespoons of white vinegar per quart of warm distilled water. Scrub the evaporator rods gently with a soft cloth to remove calcium deposits that cause ice to stick.
5. Rinse the interior three times with fresh water to remove all vinegar residue.
6. Plug the unit back in and select the "Small" ice size setting for the first three cycles. Smaller cubes put less torque on the motor and help verify that the harvest mechanism is operating smoothly before moving to "Large" cubes.

If That Didn't Work

• Check for Obstructions: Use a flashlight to inspect the bottom of the ice bin area. A small piece of plastic flashing or a stray ice shard may be lodged in the auger's path, causing the motor to strain. Use a toothpick to clear any debris from the gaps between the evaporator fingers.
• Switch to Distilled Water: If you are using hard tap water, mineral scale builds up on the evaporator rods, creating a "sandpaper" effect that grips the ice too tightly. Replace your water source with distilled water for one week to see if the grinding noise diminishes as the scale is flushed out.
• Calibrate the Ambient Temperature: If the machine is placed in a very cold room (below 60°F/15°C), the evaporator may over-freeze, making the ice too hard to harvest. Move the unit to a warmer area of the kitchen to ensure the internal thermostat triggers the harvest cycle at the correct temperature.
• Inspect the Gear Drive: If the noise persists after a full thaw, the internal plastic drive gear may have developed a flat spot or a crack. While these are not user-serviceable without voiding the warranty, you can try tilting the machine 45 degrees while off to see if any loose plastic fragments rattle inside the chassis.

Heads Up

• Never use metal utensils or ice picks to scrape ice off the evaporator rods, as this will scratch the aluminum coating and cause permanent "ice welding," making the grinding noise permanent.
• Avoid filling the water reservoir to the absolute brim; leave a 1/2 inch gap to prevent overflow into the internal electronics, which can cause erratic harvest timing.
• Run a descaling cycle with a citric acid solution once every 30 days to prevent the mineral buildup that leads to harvest failure.
• Ensure there is at least 6 inches of ventilation space around the sides and back of the machine; overheating the condenser can lead to inefficient freezing and harder ice blocks.