E18
Gram
General System Error / Firmware Fault
Oven shows E18 and beeps continuously; some functions may be disabled.
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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 on main PCB, Voltage spike damage, Internal communication error between boards, Defective main control board
How to Fix / Troubleshooting
Safety first: Switch off power at the mains.
Steps to check:
- Perform a power reset by turning off the breaker for at least 10 minutes, then restoring power.
- Ensure the mains supply is stable and within the voltage range specified by Gram.
- If the error returns immediately and no specific hardware fault is found, the main control board is likely defective.
- Replace the main PCB with a Gram-approved spare, transferring any configuration jumpers as per service instructions.
Warning: Firmware reprogramming (if supported) should only be done with official Gram tools and files.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (PCB)
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