E06 error and the softener shows incorrect or no salt level reading (on models with electronic salt sensor)

Safety first: Disconnect power before working inside the brine tank or on wiring.

• Inspect brine tank: Remove the lid and visually check the salt level. If there is a hard crust (salt bridge) above an empty space, the sensor may be reading incorrectly.
• Break salt bridge: Using a plastic or wooden stick, gently break up any hardened salt crust. Do not use metal tools that could damage the tank.
• Clean sensor probes: If your Monarch model uses metal probes, carefully wipe them with a damp cloth to remove salt deposits. Ensure they are not bent or touching each other.
• Check wiring: Trace the sensor cable from the brine tank to the control board. Confirm all connectors are fully seated and free from corrosion.
• Reset alarm: After cleaning and reconnecting, power the unit back on and follow the manual to clear the E06 alarm. If the error returns, the sensor module may need replacement.