E07
BWT Perla
Salt Level / Brine Sensor Fault
Display shows E07 and the unit reports a salt level or brine sensor 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
Disconnected or damaged salt level sensor cable, Contaminated brine sensor probe, Defective optical or conductivity sensor in brine well, Incorrect sensor configuration in control menu
How to Fix / Troubleshooting
Safety first: Disconnect power before handling any internal wiring or sensors.
- Locate the sensor: Depending on the BWT Perla model, the salt/brine sensor may be an optical probe or conductivity sensor mounted in the brine well or tank wall. Remove the brine well cover to access it.
- Inspect wiring: Follow the sensor cable to the control board. Check for cuts, pinched sections, or loose connectors. Reseat the plug on the main PCB.
- Clean the sensor: Carefully remove the sensor from the brine well. Wipe off salt deposits and sludge with a soft cloth and warm water. Do not use abrasive tools.
- Check configuration: In the installer menu, verify that the correct sensor type is selected (if configurable) and that salt monitoring is enabled/disabled according to the installed hardware.
- Test operation: Reinstall the sensor, restore power, and check if the E07 code clears after a reset. If the error persists, the sensor itself may be defective and should be replaced with a BWT-compatible part.
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Repair Difficulty
Medium
3/5
Required Part
Salt Level / Brine Sensor
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