EC28
Sub-Zero
Control Calibration / EEPROM Fault
Wine cooler displays EC28 and may not respond to temperature adjustments; setpoints may not change or may revert.
Advertisements
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.
Advertisements
Possible Causes
Corrupted control memory, Power surge or interruption during programming, Faulty main control board, Incompatible replacement board not configured
How to Fix / Troubleshooting
Safety first: Disconnect power before accessing the control board.
Step 1 – Power reset
- Turn the unit OFF and unplug or switch off the breaker for 10 minutes.
- Restore power and attempt to adjust temperatures again.
Step 2 – Check for recent service
- If a control board was recently replaced, it may not have been properly configured for your specific model.
- Contact the installer or a Sub‑Zero technician to verify configuration settings.
Step 3 – Board replacement
- If EC28 persists and no recent changes were made, the control’s memory may be corrupted.
- Replacement of the main control board is typically required and may need model‑specific programming.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements