Dacor Range Oven Cooktop Error Code L6

The L6 error code on Dacor third generation dishwashers indicates a pressure sensor fault where the output signal has exceeded 4.8 volts. The pressure sensor is responsible for monitoring water levels inside the dishwasher tub by converting water pressure into a voltage signal that the control unit reads to manage fill cycles, wash sequences, and drain operations. When this signal rises above 4.8V, the control unit interprets it as an out-of-range reading and halts normal operation to prevent potential overfill or component damage.

The fault typically originates in one of three areas: the pressure sensor itself, the wiring and connectors between the sensor and the control board, or the control unit. A sensor that has failed internally can output a continuous high-voltage signal regardless of actual water level. Damaged or shorted cables connecting the sensor to the control board can also drive the signal voltage abnormally high. In some cases, the control unit itself may be misreading or generating an incorrect reference voltage, producing a false fault condition.

Diagnosis should begin with a visual inspection of the pressure sensor and all associated wiring harnesses for signs of corrosion, pinching, or damaged insulation. The cable connections at both the sensor end and the control board end should be checked for secure seating and continuity. If the wiring checks out, the sensor output voltage should be measured directly to confirm whether the fault is genuine or a result of a failing control unit.