ice maker is running but the cubes are super thin and hollow, like shells, they melt instantly.

Diagnosis

The production of "shell" ice—thin, hollow cubes that lack a solid core—is caused by a failure in the thermal equilibrium of the freezing cycle. The Igloo Premium Portable Ice Maker operates on a fixed timer; it doesn't have a sensor to detect when the ice is actually solid. Instead, it runs the compressor for a set duration and then triggers the "harvest" phase where the pins rotate to drop the ice. If the water entering the freezing tray is too warm, the exterior of the cube freezes quickly against the cold metal pins, but the core remains liquid. When the harvest cycle begins, the liquid center drains out, leaving only a thin frozen shell. This issue is typically exacerbated by two factors: high ambient room temperature or warm water in the reservoir. If the machine is placed in a hot kitchen or near a heat source (like an oven or dishwasher), the refrigerant cannot dissipate heat efficiently, reducing the cooling power of the evaporator pins. You can confirm this by feeling the sides of the unit; if they are excessively hot to the touch or if the water reservoir feels lukewarm, the machine is struggling to reach the necessary freezing point within the timed window.

How to Fix It

To restore solid, dense ice production, you must lower the starting temperature of the water and optimize the machine's cooling environment. Follow these exact steps:

1. Drain and Purge: Empty the current water reservoir completely. If there are thin, melted shards of ice in the basket, remove them to prevent them from insulating the remaining ice.
2. Pre-Chill the Water: Fill the reservoir with chilled, filtered water. For the best results, use water that has been refrigerated to approximately 40°F (4°C). If you do not have a pitcher of cold water, add 5-10 existing ice cubes directly into the water reservoir to act as a heat sink.
3. Relocate the Unit: Move the machine to a cool, well-ventilated area. Ensure there is at least 6 inches of clearance on all sides of the unit. Do not place the machine inside a cabinet or directly next to a heat-generating appliance.
4. Power Cycle: Unplug the unit from the wall outlet for 10 minutes. This allows the internal refrigerant pressures to equalize and ensures the compressor starts from a neutral state.
5. Initial Run: Plug the unit back in and start a new cycle. The first 2-3 batches may still be slightly thin as the evaporator pins reach their optimal temperature, but subsequent batches should be solid.

If That Didn't Work

• Deep Clean the Condenser: Dust buildup on the internal cooling fins prevents the refrigerant from shedding heat. Use a vacuum cleaner or a can of compressed air to blow out the vents on the sides and back of the machine. If the vents are clogged with kitchen grease or dust, the compressor will overheat and fail to freeze the core of the cube.
• Check for Mineral Scaling: Calcium buildup on the freezing pins acts as an insulator, preventing the cold from transferring efficiently to the water. Run a cleaning cycle using a mixture of white vinegar and distilled water (50/50 ratio). Let the solution sit in the reservoir for 30 minutes before running the self-cleaning cycle to strip away lime scale.
• Verify Voltage Stability: If the machine is plugged into a crowded power strip or an extension cord, it may not be receiving the full voltage required for the compressor to run at peak efficiency. Plug the unit directly into a grounded 120V wall outlet to ensure the motor is running at maximum RPM.
• Inspect the Water Pump: Listen for the pump during the filling stage. If the pump is struggling or making a grinding noise, it may be delivering water too slowly, causing the water to freeze unevenly. Ensure the pump intake at the bottom of the reservoir is free of debris or slime.

Heads Up

• Avoid Distilled Water: While it sounds counterintuitive, using 100% distilled water can sometimes lead to "softer" ice that melts faster. Use filtered tap water for a more rigid crystalline structure.
• Don't Overfill: Never fill the reservoir past the "MAX" line. Overfilling can interfere with the water flow sensors and lead to inconsistent cube thickness.
• Avoid Constant Operation: To prevent compressor burnout, avoid running the machine 24/7. Give it a 2-hour break every 12 hours of operation to prevent the internal coils from overheating.
• Basket Management: Remove ice as it is produced. If the basket becomes completely full, the weight of the ice can press against the harvest pins, slowing down the cycle and causing the next batch to melt slightly before they drop.