E1
Certikin
User Interface / Keypad Communication Fault
E1 error on display; heater does not respond to keypad inputs correctly.
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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
Loose ribbon cable between display and main PCB, Moisture ingress into Certikin control panel, Failed keypad membrane, Faulty display PCB
How to Fix / Troubleshooting
Safety first: Isolate power before removing the front control panel.
- Dry the panel: If condensation or water is visible on or behind the display, gently dry the area with a soft cloth. Do not use heat guns.
- Check ribbon cable: Carefully unplug and re-plug the ribbon cable between the display and main PCB, ensuring it is fully seated and not twisted.
- Inspect for damage: Look for cracks in the keypad membrane or signs of corrosion on the display board.
- Reassemble and test: Restore power and check if the E1 code clears and buttons respond normally.
Persistent E1 faults usually require replacement of the Certikin display/keypad assembly or main PCB.
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Repair Difficulty
Medium
3/5
Required Part
Certikin display / keypad PCB
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