Er
Climadiff
General Control Error / EEPROM or Firmware Fault
Display shows Er or flashes all segments; controls may be unresponsive.
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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
Corrupted control board memory after power surge, Loose connections to display, Faulty main PCB, Incorrect voltage supply
How to Fix / Troubleshooting
Safety: Disconnect the appliance from power before inspecting electrical components.
- Power reset: Unplug the unit for at least 10 minutes to allow capacitors to discharge, then reconnect.
- Check supply voltage: Ensure the outlet provides stable voltage within the Climadiff specification (usually 220–240 V in EU). Avoid using undersized extension cords.
- Inspect wiring: Remove the control panel and rear cover to check all harnesses between the display and main PCB. Reseat connectors.
- Surge damage: If the error appeared after a storm or outage, the PCB may be damaged. Look for burn marks or swollen components.
- Replace PCB: If Er persists and wiring is sound, replace the main control board with the exact Climadiff part number.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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