Dishwasher shows E19; water may not transfer correctly between heat exchanger and sump.

Safety first: Disconnect power and close the water tap.

E19 is associated with the valve that controls water flow from the heat exchanger/softener to the sump.

• Step 1 – Access left side:
  • Remove the left side panel to expose the heat exchanger and associated valves.
• Step 2 – Locate regeneration valve:
  • Find the small solenoid valve attached to the heat exchanger/softener assembly.
  • Inspect wiring and connector for damage.
• Step 3 – Clean and inspect:
  • Check for limescale or debris around the valve and channels.
  • Gently tap the valve body to free a stuck plunger (do not hit hard).
• Step 4 – Replacement:
  • If the valve coil is open-circuit or the valve remains stuck, replace the regeneration valve with the correct Siemens part.

Proper operation of this valve is important for water softening and correct filling; do not ignore E19.