Dishwasher shows H3, often indicating an overheat or temperature control issue.

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

Stuck heater relay, Faulty NTC sensor, Blocked circulation causing localized overheating, Control board fault

Safety: Unplug the dishwasher and allow it to cool fully.

Reset: After cooling, disconnect power for 10 minutes, then reconnect and run a short cycle.
Check circulation: Ensure spray arms rotate freely and the circulation pump is working; poor flow can cause overheating.
Test NTC: Measure NTC resistance at room temperature and replace if out of range.
Control board: If the heater remains on when it should not, the control board relay is likely stuck and the board needs repair or replacement.

Professional Required 5/5

Main Control Board

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