Diagnosis
This issue occurs when the water distribution system fails to fill the freezing molds to their maximum capacity before the cooling cycle begins. In the Magic Chef MCIM22ST, the water pump pushes water through a distribution tray; if there is a partial blockage from mineral scale (calcium/magnesium buildup) or a failing pump impeller, the water level in the molds remains low. This results in "sliver" ice or thin sheets rather than the intended thick, square cubes.
You can confirm this by observing the filling stage. If you see water trickling slowly into the molds or if the water level doesn't reach the top of the mold cavity before the machine transitions to the freezing phase, the problem is hydraulic. If the water fills completely but the ice is still thin, the issue is likely an ambient temperature problem or a refrigerant leak, but 90% of the time with this specific model, it is a scale-related flow restriction.
How to Fix It
To resolve this, you must perform a deep descaling of the internal plumbing and pump to restore full water flow. Follow these exact steps:
- Unplug the unit from the wall outlet and remove the ice basket to expose the reservoir and the mold tray.
- Empty any remaining water and ice from the reservoir.
- Mix a descaling solution: Combine 2 cups of distilled white vinegar with 2 cups of warm (not boiling) filtered water. Pour this directly into the water reservoir.
- Plug the machine back in and power it on.
- To initiate the specialized cleaning mode: Press and hold the Power and Ice Size buttons simultaneously for 3 to 5 seconds. The indicator lights will flash to confirm the cycle has started.
- Allow the cleaning cycle to run for its full duration (approximately 15-20 minutes). The machine will pump the vinegar solution through the internal lines and over the freezing pins to dissolve mineral deposits.
- Once the cycle finishes, drain the reservoir completely.
- Fill the reservoir with fresh, filtered water and run two full "normal" ice cycles. Discard the first two batches of ice to ensure all residual vinegar is flushed from the system.
If That Didn't Work
If the cubes remain thin after a deep clean, try these advanced troubleshooting steps:
- Check the Water Filter: If you are using an external filtration system or a specific brand of bottled water with high mineral content, the filter may be restricting flow. Try filling the reservoir with distilled water for one cycle to see if the cube volume increases.
- Inspect the Water Pump Intake: Use a flashlight to look into the reservoir. If you see slimy buildup or debris around the pump intake screen, use a soft-bristled toothbrush dipped in vinegar to gently scrub the intake area.
- Adjust Ambient Temperature: If the machine is placed in a room that is over 90°F (32°C) or directly in sunlight, the cooling cycle may be compromised, causing the ice to melt partially during the "harvest" phase, leaving you with thin slivers. Move the unit to a cool, shaded area with at least 6 inches of clearance on all sides.
- Verify Power Stability: Ensure the unit is plugged directly into a wall outlet rather than a surge protector or extension cord. Low voltage can cause the water pump to run at a lower RPM, failing to push enough water into the molds.
Heads Up
Keep these maintenance tips in mind to prevent future sliver-ice issues:
- Use Filtered Water: Always use filtered or distilled water. Tap water high in calcium will create "scale" that clogs the small apertures in the distribution tray.
- Monthly Descaling: Do not wait for the ice to get small to clean the machine. Run the vinegar cleaning cycle once every 30 days to keep the pump and molds clear.
- Avoid Overfilling: Never fill the reservoir past the "MAX" line, as this can cause air pockets in the pump system, leading to uneven filling of the molds.
- Keep it Level: Ensure the MCIM22ST is on a perfectly flat surface. If the machine is tilted, water will pool on one side of the tray, resulting in some cubes being full and others being thin slivers.