Safety first: Disconnect power. Heating components operate at mains voltage and can be hazardous.

Check for obvious signs: Remove the lower panel and inspect the flow-through heater or base heater for burn marks or leaks.
Test element: Disconnect the heater terminals and measure resistance with a multimeter. An open circuit indicates a failed element that must be replaced.
Inspect NTC sensor: Locate the temperature sensor (often clipped into the sump or heater). Check its connector and wiring. Measure resistance and compare with service data; replace if out of range.
Control board inspection: Remove the control module cover and visually inspect the heater relay and solder joints for burning or cracks. If damaged, the control board may need replacement or professional repair.
Reassemble and test: After replacing faulty parts, run a hot program and verify that the water heats (door and side panels will become warm).

Dishwasher stops, does not heat water, and displays E05.

Possible Causes