E18
Pevino
Alarm Circuit / Buzzer Control Fault
Display shows E18 and the unit emits a continuous alarm even though temperatures appear normal.
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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
Stuck alarm condition in main control firmware, Failed buzzer driver transistor on PCB, Shorted alarm button on control panel, Corrupted control board memory
How to Fix / Troubleshooting
Safety: Disconnect power before removing the control panel or main board.
- Power cycle: Unplug the unit for at least 10 minutes to allow the control board to fully reset, then reconnect.
- Check for active alarms: Verify that doors are fully closed and temperatures are within set ranges. Clear any displayed alarms using the control panel buttons.
- Inspect control panel: Remove the panel and check for stuck or damaged buttons that might be continuously signaling an alarm condition.
- Board replacement: If the alarm persists with no real fault, the main control board or control panel PCB may be defective and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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