E10
Monarch
Control PCB / Firmware Error
E10 error and the display shows a general electronics or PCB fault
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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
Power surge or brownout damaging PCB, Corrupted firmware, Loose display or keypad ribbon cable, Moisture ingress into control housing
How to Fix / Troubleshooting
Safety first: Isolate the electrical supply before opening the control panel.
- Power reset: Turn off power for at least 5 minutes to allow capacitors to discharge, then restore power and check if the error clears.
- Inspect control housing: Remove the control cover and look for signs of moisture, corrosion, or burnt components on the PCB. If moisture is present, dry gently with a hairdryer on a cool setting and allow to air dry fully.
- Check connections: Reseat all plug-in connectors, including the display ribbon, sensor harnesses, and power input. Ensure there are no bent pins.
- Surge protection: If the error followed a power cut or lightning storm, consider fitting a surge-protected outlet for future protection.
- Board replacement: If E10 persists and there is no visible wiring fault, the control PCB will likely need replacement with the correct Monarch part. This is often best done by an authorised technician.
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Repair Difficulty
Hard
4/5
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