E9
CTC
EEPROM / Control Memory Error
Display shows E9 and unit will not operate; may occur after a power surge
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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
Corrupted firmware in main control PCB, Power surge damage, Faulty EEPROM chip, Loose control board connectors
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before touching any control components.
Steps to check:
- Disconnect power for at least 5 minutes to allow the control to fully discharge, then restore power to see if the error clears.
- Inspect the main control PCB for visible damage such as burn marks, swollen components, or corrosion.
- Ensure all multi-pin connectors on the control board are fully seated.
- If the error persists, the control firmware may be corrupted. Some CTC models allow firmware re-flash via a service port; this must be done by an authorized CTC technician.
- If reprogramming is not available or fails, replace the main control PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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