E09
Dimplex
Internal Control PCB Fault
E09 displayed; unit does not heat and may show internal fault indicator
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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
Microcontroller failure, Corrupted firmware, Internal PCB short, Surge damage from mains supply
How to Fix / Troubleshooting
Safety: Turn off power at the isolator.
- Power reset: Leave the unit powered off for at least 5 minutes, then restore power to see if the error clears.
- Check supply quality: Verify that the supply voltage matches the rating on the Dimplex nameplate and that there are no obvious signs of surge damage (burn marks, melted components).
- Inspect for moisture: Look for water ingress on the PCB. If present, correct the leak source and allow the board to dry completely before retesting.
Action: Persistent E09 typically requires replacement of the main control PCB. This should be done by a qualified technician with access to the correct Dimplex replacement board.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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