mypros+
Error code reference

Zenith Dishwasher Error Code F8

Diverter feedback error

Zenith codesZenith dishwasher codes

Diverter feedback error - Feedback communication from diverter is not present or not correct.

MyPros+ Max

Get the full diagnostic procedure for F8.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F8 means on a Zenith dishwasher

The F8 error code on a Zenith dishwasher indicates a diverter feedback error, meaning the control board is not receiving the expected position or status signal from the diverter system. The diverter is a motorized valve assembly responsible for directing water flow between the upper and lower spray arms during the wash cycle. When the control board sends a command to the diverter motor, it expects a return feedback signal confirming the valve has moved to the correct position. If this confirmation signal is absent or falls outside acceptable parameters, the F8 code is triggered and the cycle is interrupted.

The feedback mechanism typically relies on a position sensor, hall effect sensor, or optical encoder integrated into the diverter motor assembly. These components communicate rotation or valve position data back to the main control board via a dedicated wiring circuit. A break anywhere in this communication path, including connectors, harness wiring, the sensor itself, or the motor, can cause the board to register no signal or an incorrect one.

Common root causes include a failed diverter motor, a damaged or corroded wiring harness between the diverter assembly and the control board, a faulty position sensor within the diverter unit, or a defective main control board that cannot process the incoming feedback signal. Physical obstructions jamming the diverter valve can also prevent movement, causing the feedback signal to indicate an error state.

Source: manufacturer service documentation.

Common causes of F8

  1. 01

    Failed diverter motor

    Part replacement

    The diverter motor may have burned out or seized, preventing movement and eliminating the feedback signal entirely. Check for continuity through the motor windings and listen for any mechanical hum or clicking when the cycle starts.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    Corrosion, pinching, or a loose connector in the wiring harness between the diverter assembly and the control board can interrupt the feedback signal. Inspect the full harness run for visible damage and reseat all connectors at both ends.

  3. 03

    Faulty position sensor or feedback sensor

    Part replacement

    The sensor embedded in the diverter unit that reports valve position can fail independently of the motor. If the motor operates but the feedback signal is still missing or erratic, the sensor is a likely culprit.

  4. 04

    Physical obstruction in the diverter valve

    Wiring / connection

    Food debris, broken glass, or other foreign material can jam the diverter valve so it cannot rotate to the commanded position. Remove the lower wash arm assembly and inspect the diverter for obstructions before assuming an electrical fault.

  5. 05

    Defective main control board

    Part replacement

    If the wiring, motor, and sensor all test correctly, the control board itself may have failed and is unable to send commands or interpret the feedback signal. This is the least common cause and should be diagnosed after all other components are cleared.

See the test procedure for each cause

Frequently asked questions about F8

What does F8 mean on a Zenith dishwasher?
The F8 code on a Zenith dishwasher indicates a diverter feedback error. This means the control board sent a command to the diverter valve to change position but did not receive the expected confirmation signal back. The dishwasher stops the cycle to prevent running without proper water distribution to the spray arms.
Can I fix the F8 error myself without calling a technician?
Some causes of the F8 error are DIY-accessible. Start by checking for obstructions in the diverter valve and inspecting the wiring harness connectors for corrosion or loose connections. If the issue is a failed diverter motor or position sensor, replacement parts are generally available, though accessing the diverter assembly requires removing the lower spray arm and may involve pulling the dishwasher out from the cabinet depending on your model.
Is it safe to keep using my Zenith dishwasher with the F8 error?
You should not continue running wash cycles while the F8 error is active. Without a functioning diverter, water may not reach all spray arms correctly, resulting in poor cleaning performance. In some cases the dishwasher will stop mid-cycle anyway, potentially leaving standing water in the tub.
Will resetting the dishwasher clear the F8 error code?
A reset may temporarily clear the F8 code from the display, but if the underlying fault in the diverter system has not been resolved, the error will return when the dishwasher attempts the next cycle. A reset is useful for ruling out a one-time control board glitch, but a recurring F8 code requires physical diagnosis of the diverter motor, wiring, and sensors.
How much does it typically cost to repair a Zenith dishwasher F8 error?
Repair costs vary depending on the failed component. A wiring harness repair or connector replacement is the least expensive option, often falling in the range of $20 to $80 in parts if done yourself. A replacement diverter motor or sensor assembly typically costs between $40 and $150 in parts. If the main control board is the cause, parts alone can range from $100 to $250 or more, and professional labor adds additional cost on top of any parts.

Related Zenith dishwasher codes

All Zenith dishwasher codes
View all 22 Zenith dishwasher codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass