Dishwasher displays HE2; may indicate overheating or heater relay stuck on.

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

Heater relay on PCB stuck closed, Faulty thermistor reading low, Scale buildup on heater causing localized overheating

Safety first: Turn off power at the breaker immediately to prevent damage.

Inspect heater and sump: Access the underside and check the heater element and sump for heavy scale or mineral buildup. Descale if necessary using dishwasher cleaner.
Check thermistor: Test the temperature sensor for correct resistance. Replace if readings are incorrect.

If HE2 persists, the main control board heater relay may be stuck and the board should be replaced by a technician.

Hard 4/5

Main Control Board

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