the power light is on but the whole thing is just dead, no sounds, no lights for ice size or anything

Diagnosis

The Costway EP24744US is experiencing a "logic freeze," where the power supply delivers enough current to light the primary power LED, but the main control board has entered a lockout state. This typically occurs after a voltage spike from the wall outlet or when the internal thermal fuse triggers due to an overheat condition (often caused by poor ventilation or using water that is too warm). When this happens, the microcontroller becomes unresponsive, ignoring inputs from the ice size buttons and failing to trigger the compressor or the water pump. You can confirm this is a logic failure rather than a total hardware blowout by observing the power light. If the light is steady but the unit is silent—no humming from the compressor and no clicking from the relays—the board is stuck in a standby loop. If the unit was working recently and suddenly stopped after a power flicker, the internal capacitors are likely holding a residual charge that is preventing the board from rebooting into its operational state.

How to Fix It

To resolve this, you must perform a complete capacitive discharge to force the control board to reboot from a cold state. Follow these exact steps:

1. Disconnect the power cord from the 120V wall outlet completely. Do not use a power strip or surge protector for this process; plug directly into the wall later.
2. Remove the water reservoir from the top of the unit. Ensure there is no standing water leaking into the control panel area.
3. Locate the Power button on the front interface. Press and hold this button firmly for a full 20 seconds. This drains the remaining electricity stored in the capacitors on the main PCB, clearing the frozen logic state.
4. Leave the unit unplugged for a minimum of 10 minutes. This allows the internal temperature of the compressor and the control board to stabilize.
5. While the unit is unplugged, check the air intake vents on the sides and back. Use a vacuum or compressed air to clear any dust buildup that may have caused the overheat lockout.
6. Plug the unit back into a known-working wall outlet.
7. Firmly reseat the water reservoir, ensuring it clicks into place. If the reservoir is not seated perfectly, the float switch may prevent the machine from initiating the cycle.
8. Press the Power button once. You should hear a relay click followed by the humming of the cooling system within 30 seconds.

If That Didn't Work

• Check the internal fuse. If you have a multimeter, open the bottom chassis and test the continuity of the glass fuse on the power board. If the fuse is blown, the unit may have enough current for a low-voltage LED but not enough to drive the compressor. Replace it with an identical amperage fuse.
• Inspect the water level sensor. If the internal float is stuck in the "up" position (indicating the bin is full) or the "down" position (indicating no water), the logic board will refuse to start the cooling cycle to protect the pump. Gently shake the unit to see if the float releases.
• Test the outlet with a different high-draw appliance. Sometimes a tripped GFCI outlet provides enough "leakage" voltage to light a small LED but cannot provide the 10-12 amps required to kickstart the compressor.
• Verify the ambient temperature. If the room is below 50°F (10°C) or above 95°F (35°C), the EP24744US may enter a protective shutdown mode. Move the unit to a temperature-controlled environment and repeat the hard reset.

Heads Up

• Avoid using distilled water. The sensors in the EP24744US rely on the mineral content of the water for conductivity; using pure distilled water can sometimes confuse the sensors and cause the machine to stop mid-cycle.
• Ensure there is at least 6 inches of clearance on all sides of the unit. The compressor generates significant heat, and restricted airflow is the leading cause of the logic board entering a thermal lockout state.
• Do not use the unit immediately after transporting it horizontally. If the machine was tilted, wait 24 hours for the refrigerant oil to settle before plugging it in, or you risk permanent compressor failure.
• Clean the interior with a mixture of white vinegar and water once a month to prevent calcium buildup on the freezing pins, which can cause the board to detect a "jam" and shut down.