water is leaking out from the bottom of the unit, not from the overflow hole.

Diagnosis

The Newbulig Portable Ice Maker utilizes a closed-loop water system where water is pumped from the reservoir to the freezing evaporator plates and then drained back down. When water leaks from the bottom casing rather than the designated overflow hole, it typically indicates a failure in the plumbing seals or a breach in the reservoir integrity. This is often caused by the silicone drain plug at the base becoming dislodged or degraded, or a vibration-induced loosening of the internal silicone tubing that connects the pump to the evaporator. To confirm the source, place the unit on a dry, white paper towel and fill the reservoir halfway. Observe the drip pattern. If the leak is concentrated at the rear bottom edge, it is likely the drain plug. If the water seeps from the center or front of the chassis, it indicates an internal hose rupture or a hairline crack in the plastic reservoir tank, often caused by thermal expansion and contraction cycles during the freezing process.

How to Fix It

To resolve a bottom-leakage issue, follow these precise steps to secure the external seals and inspect the internal plumbing:

1. Unplug the unit from the wall outlet immediately and remove the ice basket to completely empty the water reservoir.
2. Flip the unit carefully onto its side or back. Locate the circular silicone drain plug located on the bottom chassis. This plug is designed to be removable for defrosting and cleaning.
3. Inspect the plug for debris, slime, or mineral buildup that may be preventing a flush seal. Use a damp cloth to clean the rim of the drain hole.
4. Firmly press the silicone plug into the aperture. Apply steady pressure until you feel it "snap" or seat fully against the housing. If the plug feels loose or stretched, wrap a single layer of PTFE (plumber's) tape around the plug's neck before re-inserting it.
5. If the leak persists, you must check the internal hose. Remove the four screws on the bottom plate (if applicable to your specific model revision) to access the pump assembly.
6. Locate the clear silicone tubing connecting the water pump to the evaporator plate. Check for any "slip-offs" where the hose has slid off the plastic barb. Push the hose firmly back onto the barb and secure it with a small, plastic zip-tie tightened exactly 2mm from the connection point.
7. Reassemble the casing and run a "Cleaning" cycle to ensure no air pockets are trapped in the lines, which can cause erratic pressure and further leaks.

If That Didn't Work

• Inspect for Reservoir Stress Cracks: Empty the machine and use a high-intensity flashlight to examine the corners of the plastic water tank. Look for "spider-web" fractures. If a crack is found, use a food-grade, waterproof epoxy or a specialized plastic welding sealant. Apply the sealant to the exterior and interior of the crack and let it cure for 24 hours before refilling.
• Replace the Water Pump Seal: If water is dripping specifically from the pump motor housing, the internal impeller seal has failed. This requires replacing the pump assembly (Part #NB-PUMP-01 or equivalent). Ensure the new pump is seated flush against the chassis to prevent vibration-induced leaks.
• Check the Evaporator Plate Gaskets: Occasionally, the gaskets where the cooling fins meet the chassis can leak. Use a dry cloth to wipe the area and watch for condensation that turns into a steady stream. If the gasket is pinched, gently massage it back into place using a blunt tool like a plastic spudger.
• Verify Leveling: If the machine is tilted forward or backward, water may pool in areas not designed for containment, eventually bypassing the overflow system. Use a bubble level to ensure the unit is perfectly flat on the countertop.

Heads Up

• Avoid Harsh Chemicals: Never use bleach or abrasive cleaners on the silicone drain plug, as this can degrade the material and cause it to shrink, leading to chronic leaks.
• Regular Descaling: Mineral buildup from hard water can crystallize around the seals and the drain plug, creating microscopic gaps. Run a descaling solution (water and white vinegar) every 2-4 weeks to keep seals supple.
• Thermal Shock Warning: Do not pour boiling or ice-cold water directly into the reservoir; extreme temperature swings can cause the plastic tank to warp or develop the hairline cracks mentioned in the diagnosis.
• Storage Protocol: When not in use for more than a week, always pull the drain plug and let the unit air dry completely. Storing the unit with water inside can lead to seal degradation and mold growth.