ICE EC05
Sub-Zero Compressor Start / Overload Fault

Ice maker shows EC05 or service code 05 and shuts down with the compressor not running.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed compressor start relay, Open overload protector, Locked compressor, Low supply voltage

How to Fix / Troubleshooting

Safety: Disconnect power before accessing the compressor compartment. Capacitors can hold a charge; discharge safely if handling.

Steps to address EC05:

  • 1. Listen for start attempts: When power is applied, a clicking sound every few minutes may indicate the compressor is trying to start and tripping the overload.
  • 2. Check ventilation and condenser cleanliness: Overheating can cause overload trips. Clean the condenser coil and ensure proper airflow.
  • 3. Inspect start components: Access the compressor terminal cover. Remove the cover and inspect the start relay and overload for signs of burning or cracking.
  • 4. Test start relay and overload: With power off, use a multimeter to check continuity of the overload and proper operation of the start relay (per the tech sheet). Replace with OEM Sub-Zero start device kit if defective.
  • 5. Evaluate compressor: If new start components do not resolve the issue and the compressor still fails to start or draws locked-rotor current, the compressor may be mechanically locked and require replacement by a certified technician.
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Repair Difficulty

Professional Required 5/5

Required Part

Compressor Start Device Kit
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