Equator Dishwasher Error Code E5

The E5 error code on an Equator dishwasher indicates a fault with the water temperature sensor, also called a thermistor or NTC sensor. This component is responsible for monitoring the water temperature throughout the wash and rinse cycles, feeding continuous resistance-based readings to the control board. When the control board detects that the sensor's resistance values fall outside the expected range, or that the circuit is completely open or shorted, it triggers the E5 code and halts normal operation to prevent overheating or ineffective washing.

The fault can present in two distinct ways: a short circuit, where resistance drops abnormally low and the sensor reads an artificially high temperature, or an open circuit (break), where the resistance is infinite and no valid temperature reading can be obtained. Either condition causes the control board to flag the sensor as failed. The sensor is typically located in the sump area or on the heating element assembly, submerged in water during operation, which makes it susceptible to mineral scale buildup, corrosion, and physical damage over time.

Diagnosing E5 begins with testing the temperature sensor for continuity and proper resistance using a multimeter. A functioning NTC thermistor will show a measurable resistance value that changes with temperature. A reading of zero ohms suggests a short circuit, while an open-loop (OL) or infinite reading indicates a broken circuit. If resistance values are outside the expected range at a known temperature, sensor replacement is the appropriate repair. Wiring harness connections between the sensor and the control board should also be inspected for corrosion, pinching, or loose terminals before replacing the sensor itself.