E20
Scotsman
Control Board Communication or Internal Fault
Display shows 'E20' and unit will not start
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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
Control board failure, corrupted firmware, power supply issue, loose control connectors
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before opening the control compartment.
- Check power supply: Verify correct voltage at the unit’s input terminals. Loose connections can cause control errors.
- Inspect control board: Look for burned components, bulging capacitors, or signs of moisture damage.
- Reseat connectors: Unplug and reconnect all harnesses to the control board to ensure good contact.
- Power cycle: Restore power and see if the error clears. If E20 returns immediately, the board is likely defective.
- Replace control board: Install a Scotsman OEM control board if needed, following anti-static precautions and wiring diagrams.
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Repair Difficulty
Hard
4/5
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