Er
Transtherm
General Control Panel / Display Communication Error
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
Loose or damaged ribbon cable between display and main board, Failed display PCB, Firmware error on main control board, Moisture ingress into control panel
How to Fix / Troubleshooting
Safety: Disconnect mains power before removing the control panel or display assembly.
Steps:
- Power reset: Unplug for 10 minutes, then reconnect. If Er returns, proceed.
- Access display panel: Remove the front control fascia or top trim to expose the display PCB and ribbon cable.
- Inspect cable: Check the ribbon cable for kinks, cracks, or corrosion at the connectors. Reseat both ends firmly.
- Check for moisture: Look for condensation or liquid inside the control area. Dry thoroughly and improve door gasket or installation to reduce humidity.
- Replace display PCB: If the cable is good but Er persists, replace the Transtherm display/control panel PCB.
- Consider main board: If a new display does not resolve the issue, the main control board may also need replacement.
Note: Handle the display and ribbon cable gently to avoid cracking the board or traces.
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Repair Difficulty
Hard
4/5
Required Part
Display Control Panel PCB
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