KitchenAid Dishwasher Error Code Anti-Bacterial/Heavy + Normal Wash + Quick Wash + Quick Rinse

This button combination displayed simultaneously indicates a wash thermistor out-of-range fault. The dishwasher's control board has detected that the wash thermistor is sending a temperature signal that falls outside acceptable parameters. This fault prevents the machine from confirming proper water temperature during the wash cycle.

Running the dishwasher while this fault is active is not recommended. Without a reliable temperature reading from the wash thermistor, the control board cannot verify that water is reaching the temperatures needed for proper cleaning and sanitization. Continuing to operate the machine could result in poorly cleaned dishes or damage from incorrect cycle execution.

A reset may temporarily clear the fault display, but if the underlying issue with the wash thermistor or its wiring is still present, the error will return once the dishwasher attempts to run a cycle and reads the out-of-range signal again. A reset is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and repairing the root cause.

A knowledgeable DIYer can perform this repair by locating the wash thermistor, testing it with a multimeter for proper resistance, and inspecting the wiring harness and connectors for damage or corrosion. If the thermistor tests faulty, replacing it is generally a straightforward task involving disconnecting the harness and unclipping or unscrewing the sensor. If wiring or the control board is involved, the repair becomes more complex.

If only the thermistor requires replacement, parts typically cost in the range of $20 to $60, with professional labor adding $80 to $150 depending on your area. If the issue stems from wiring harness damage, repair costs can vary widely based on the extent of the damage. Control board replacement, if needed, is the most expensive outcome and can range from $150 to $400 or more for parts alone.