E8
Chefman
Control Board / Firmware Error
Display shows E8 and the machine shuts off or refuses to start, often after a power surge or outage.
Advertisements
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.
Advertisements
Possible Causes
Corrupted control board firmware, Power surge damage to microcontroller, Low voltage or unstable power supply, Internal memory error
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker before any reset attempts.
Reset procedure:
- Unplug the unit for at least 10 minutes.
- While unplugged, press and hold the main power or brew button for 15–20 seconds to discharge internal capacitors.
- Plug the unit back in directly to a wall outlet (avoid power strips or extension cords) and try again.
Power quality check:
- Ensure the outlet provides stable voltage and is properly grounded. Avoid sharing the outlet with high-draw appliances.
If E8 remains:
- The main control PCB is likely damaged and must be replaced. This is not typically user-serviceable and should be done by a qualified technician or via manufacturer service.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements