Dishwasher displays E31; may be related to softener or water hardness control.

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.

Possible Causes

Defective softener valve, Blocked brine line, Faulty softener sensor, Control board softener driver fault

Safety first: Disconnect power before accessing side panels.

Check salt level: Ensure the salt reservoir is filled with dishwasher salt and the cap is properly closed.
Inspect softener valve: Remove the side panel to locate the softener valve on the side of the salt container. Check wiring and connectors.
Test valve coil: Measure resistance of the valve coil. An open circuit indicates a failed valve that must be replaced.
Clean brine line: If accessible, flush the brine line with warm water to remove salt blockages.

Hard 4/5

Water Softener Valve

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