Zenith Dishwasher Error Code F5

F5 on a Zenith dishwasher means the control board has detected that the water temperature inside the tub has exceeded the safe upper limit. The dishwasher stops the cycle as a protective measure. The cause can be a faulty temperature sensor, an overactive heating element, or in some cases a control board issue. Checking the sensor and water supply temperature are good starting points.

It is not recommended to continue running the dishwasher while F5 is active, as the error exists to prevent damage from excessive heat. If the water is genuinely overheating, continued use could warp plastic components, damage dishes, or stress internal parts. Address the underlying cause before resuming normal operation.

A reset may temporarily clear the F5 code and allow the dishwasher to start a new cycle, but if the underlying cause is not resolved, the error will return. Resetting the appliance by cutting power for a few minutes can be useful as a first step to confirm the fault is active and not a one-time glitch. Persistent or recurring F5 codes require proper diagnosis and component repair or replacement.

Some causes of F5 are DIY-friendly, such as checking your household water heater temperature or inspecting the wiring harness for loose connections. Replacing the thermistor is also a moderately accessible repair for someone comfortable working with appliances. However, diagnosing or replacing the control board or heating element may require a qualified technician if you are not experienced with appliance electrical systems.

Repair costs vary depending on the failed component. A replacement thermistor is typically the least expensive fix, with parts generally in the range of $10 to $40. A heating element replacement may run $20 to $80 in parts. If the main control board requires replacement, expect parts costs in the range of $80 to $200 or more, plus labor if a technician is involved.