Dishwasher shows E20; may have issues with water circulation or unusual pump noise.

Safety first: Disconnect power and drain as much water as possible from the tub before tipping the machine.

E20 indicates a problem with the circulation pump motor.

• Step 1 – Listen to the pump:
  • Start a cycle and listen: a humming without water movement suggests a jammed or seized pump.
• Step 2 – Access pump:
  • Pull the dishwasher out and lay it on its back.
  • Remove the base cover to access the circulation pump/heat pump assembly.
• Step 3 – Check impeller:
  • Remove the pump housing cover if accessible.
  • Look for foreign objects (glass, bones, seeds) blocking the impeller.
  • Remove any obstructions carefully.
• Step 4 – Spin test:
  • Try to rotate the impeller by hand; it should move smoothly with slight resistance.
  • If it is stiff or rough, the bearings may be worn.
• Step 5 – Replacement:
  • If the pump is seized or noisy, replace the complete circulation pump/heat pump assembly.

Running the dishwasher with a failing pump can cause further damage; address E20 promptly.