E09
Calphalon
Control Board / Low Voltage Error
Display shows E09 and the clock and controls are unresponsive or reset frequently.
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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
Faulty power supply circuit on control board, Loose internal harness connector, Intermittent line cord, Power surge damage
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker before inspecting the cord or moving the unit.
- Check outlet and power strip: Plug the coffee maker directly into a known-good wall outlet, avoiding power strips or GFCI outlets that may trip.
- Inspect power cord: Look for cuts, kinks, or burn marks on the cord. If damaged, do not use the machine.
- Hard reset: Unplug the unit for at least 10 minutes to discharge internal capacitors, then plug back in and reset the clock. Attempt a brew cycle.
- Monitor for flickering display: If the display dims or flickers when the heater or pump activates, the control board’s low-voltage supply may be failing.
- Professional service: Replacing the main control board or power module requires opening the housing and working with mains voltage. Have a qualified technician perform this repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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