E18
Crown
Configuration / Parameter Error
Boiler displays E18; may indicate sensor mismatch or configuration error
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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
Incorrect DIP switch settings, Wrong sensor type configured, Control board replaced without proper setup
How to Fix / Troubleshooting
Safety: Turn off power before adjusting any internal settings.
- Check DIP switches/jumpers: Refer to the Crown installation manual and verify that all DIP switches and jumpers on the control board match the boiler model and venting configuration.
- Verify connected sensors: Ensure that all required sensors (supply, return, flue, outdoor, DHW) are installed and connected.
- Do not guess settings: Incorrect configuration can damage the boiler. If you are unsure, contact a Crown-trained technician to program the control.
- Reset: After correcting any obvious misconfigurations, restore power and reset the boiler.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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