Zenith Dishwasher Error Code F13

F13 on a Zenith dishwasher indicates a temperature sensor fault where the sensor is reading an abnormally low value or is stuck at a fixed low reading. The dishwasher uses a thermistor to monitor water temperature throughout its cycles, and when that sensor signal falls outside the expected range, the control board logs F13. This fault prevents the dishwasher from completing a full cycle until the issue is resolved.

Running the dishwasher with an active F13 fault is not recommended. Without accurate temperature feedback, the control board cannot confirm that water is reaching the temperatures needed for effective cleaning and sanitation. In some cases the dishwasher may stop mid-cycle, and over time operating without proper temperature control could lead to poor wash results or additional component stress.

Repair costs depend on which component has failed. A replacement NTC thermistor is generally an inexpensive part, with the component itself typically ranging from around $10 to $40 and labor adding $50 to $150 if a technician performs the work. If the control board requires replacement, total repair costs including parts and labor can range from $150 to $350 or more depending on the board price and local service rates.

If the fault is caused by a loose connector or a transient glitch, a knowledgeable DIYer can resolve it without professional help by reseating the wiring connector or resetting the power. Replacing the NTC thermistor is also a straightforward repair for someone comfortable with basic appliance work, as it typically involves disconnecting the harness and unclipping the sensor. However, if the control board is the source of the fault, replacement is more complex and may be better suited to a technician.

A power reset, achieved by unplugging the unit or turning off its circuit breaker for a few minutes, can clear the F13 code if it was caused by a temporary software glitch. If the code returns after the reset and the dishwasher attempts a new cycle, a physical component failure such as a faulty thermistor or damaged wiring is the cause and must be addressed directly.