after a power outage, my ice maker just has a dash on the display and is totally unresponsive.

Diagnosis

The appearance of a single dash (—) on the LED display of the EUHOMY Nugget Ice Maker following a power outage indicates a "Logic Lock" or a firmware crash on the main control board. This occurs when a sudden power surge or a brownout causes the microcontroller to enter an undefined state. Instead of booting normally, the processor is stuck in a loop, unable to initialize the sensors or the compressor, which results in the unresponsive interface and the placeholder dash. This is essentially a digital "seizure" of the board. Because the machine has capacitors that hold a small amount of electrical charge even after the plug is pulled, a simple quick unplug-and-plug-back-in often fails to clear the corrupted memory. To confirm this is a logic error and not a hardware failure, check if the internal light is on; if the light works but the display shows only a dash and buttons do not respond, the control board is simply frozen and requires a full capacitive discharge to reset.

How to Fix It

To resolve the unresponsive state and clear the dash from the display, you must perform a deep hard reset to drain all residual voltage from the capacitors.

1. Initiate Manual Clear: Press and hold the Power button for a full 15 seconds. Even though the display is unresponsive and showing a dash, this action attempts to signal the board to shut down any active cycles.
2. Complete Power Severance: Unplug the power cord directly from the wall outlet. Do not use a surge protector or power strip for this step; pull the plug from the actual wall socket to ensure there is no ghost current.
3. The Capacitor Drain: Leave the machine unplugged for a minimum of 10 to 15 minutes. This is the most critical step. The capacitors on the EUHOMY control board need this time to fully deplete their stored energy, which effectively "wipes" the temporary memory (RAM) of the microcontroller.
4. Physical Inspection: While the unit is unplugged, remove the top cover and ensure no ice has bridged the sensors or that the water reservoir is filled to the "Max" line. A low-water sensor trigger during a reboot can sometimes cause the machine to enter a standby mode immediately.
5. Cold Boot: Plug the machine back into the wall outlet. Do not press any buttons for 30 seconds. Allow the machine to perform its internal self-diagnostic.
6. Power On: Press the Power button once. The display should now transition from the dash to the standard temperature or status screen, and the compressor should engage within 60 seconds.

If That Didn't Work

• GFCI Reset: If you are plugged into a GFCI outlet (the ones with the "Reset" and "Test" buttons), the power outage may have tripped the outlet itself. Even if the display shows a dash, the machine may not be receiving full voltage. Press the "Reset" button on the wall outlet firmly until it clicks, then retry the hard reset.
• Water Sensor Bypass: If the dash persists, it may actually be a "Low Water" error that is glitching. Empty the water reservoir completely, wipe the sensor probes at the bottom with a clean, dry microfiber cloth to remove mineral buildup, refill with distilled water, and restart.
• Thermal Overload Reset: If the power outage coincided with a heatwave, the compressor's thermal overload protector may have tripped. Move the unit 6 inches further away from the wall to increase airflow, let it sit unplugged for 2 hours to cool the compressor coils completely, and then power it on.
• Voltage Stabilizer Test: Try plugging the unit into a completely different circuit in your home. If the original circuit suffered a partial phase failure during the outage, it may provide enough voltage to light the LED (the dash) but not enough to boot the processor.

Heads Up

• Surge Protection: Nugget ice makers are highly sensitive to voltage spikes. Always use a high-quality surge protector to prevent the control board from frying during future power fluctuations.
• Avoid "Rapid Cycling": Never unplug and plug the machine back in repeatedly within a short window. This can cause a pressure spike in the refrigerant lines, which may damage the compressor.
• Scale Prevention: To prevent sensor errors that mimic board failures, run the "Auto-Cleaning" cycle once every two weeks using a mixture of water and white vinegar.
• Water Quality: Use filtered or distilled water. Hard water deposits on the internal sensors can cause the machine to enter an error state that looks like a software crash.