mypros+
Error code reference

Thor Kitchen Dishwasher Error Code E8

Failure of orientation of distributary valve

Thor Kitchen codesThor Kitchen dishwasher codes

Failure of orientation of distributary valve — open circuit or break of distributary valve.

First step from the service manual

Check for open circuit or break in the distributary valve.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for E8.

  • 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 E8 means on a Thor Kitchen dishwasher

The E8 error code on a Thor Kitchen dishwasher indicates a failure in the orientation of the distributary valve, specifically caused by an open circuit or a physical break in the valve or its wiring. The distributary valve is responsible for directing water flow to different wash zones or spray arm circuits during the wash cycle. When the dishwasher's control board cannot confirm proper valve positioning or detects an interruption in the electrical circuit driving the valve, it halts operation and triggers E8.

An open circuit condition means the electrical path to the distributary valve has been broken somewhere along the wiring harness, connector, or within the valve's internal solenoid coil. A break in the valve itself refers to a mechanical or electrical failure within the component, such as a burned-out solenoid winding or a cracked valve body. Both conditions prevent the control board from receiving confirmation that the valve has moved to the correct position.

Diagnosing E8 requires a systematic inspection starting at the distributary valve and working back through the wiring harness to the control board. Technicians should check for visible wire damage, corroded or loose connectors, and then use a multimeter to test continuity and resistance across the valve's solenoid terminals. A reading of infinite resistance indicates an open circuit within the solenoid coil, confirming internal valve failure. If wiring and connectors test good but the fault persists, the valve itself is the likely failed component.

Source: manufacturer service documentation.

Common causes of E8

  1. 01

    Failed distributary valve solenoid

    Part replacement

    The internal solenoid coil inside the distributary valve can burn out or break, creating an open circuit. Testing the solenoid terminals with a multimeter and finding infinite resistance confirms this failure.

  2. 02

    Broken or damaged wiring harness

    Wiring / connection

    Wires leading to the distributary valve can crack, fray, or become pinched over time, breaking the electrical circuit. Inspect the full length of the harness for visible damage and test for continuity.

  3. 03

    Corroded or loose connector

    Wiring / connection

    The electrical connector at the distributary valve can loosen or corrode, interrupting the circuit without any visible wire damage. Unplugging and reseating the connector, or cleaning corroded terminals, can resolve this.

  4. 04

    Mechanical break in the valve body

    Part replacement

    Physical cracking or fracture of the valve housing can occur due to water pressure stress or age, impairing valve movement and position sensing. A visual inspection of the valve body will reveal cracks or damage.

  5. 05

    Control board failure

    Part replacement

    If the wiring, connectors, and valve all test within normal parameters, the control board may have lost the ability to send or read signals from the distributary valve circuit. This is the least common cause and is typically diagnosed after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about E8

What does E8 mean on a Thor Kitchen dishwasher?
E8 indicates a distributary valve orientation failure caused by an open circuit or a break in the valve. The distributary valve directs water flow to different wash zones during the cycle, and the control board has detected that it cannot confirm proper valve positioning or electrical continuity. The dishwasher will stop operating until the fault is resolved.
Can I fix the E8 error myself?
Some causes of E8 are accessible to a knowledgeable DIYer, such as reseating a loose connector or inspecting wiring for visible damage. However, testing the solenoid with a multimeter and replacing the distributary valve require basic electrical knowledge and comfort working inside the dishwasher. If you are not familiar with appliance wiring, a qualified technician should perform the diagnosis and repair.
Is it safe to keep using my dishwasher when E8 is displayed?
No, you should not continue running the dishwasher while E8 is active. The distributary valve controls water routing, and running a cycle without it functioning correctly could result in inadequate washing or potential water flow issues. Power the unit off and address the fault before resuming use.
Will resetting the dishwasher clear the E8 error?
A reset may temporarily clear the error code from the display, but the code will return as soon as the dishwasher attempts to operate the distributary valve again if the underlying fault has not been repaired. Resetting is useful for confirming the error is consistent, but it is not a substitute for diagnosing and fixing the open circuit or broken valve.
How much does it cost to repair an E8 error on a Thor Kitchen dishwasher?
Repair costs depend on the specific cause. If the fix involves reseating a connector or repairing a wire, costs may be minimal, primarily covering labor if a technician is involved. Replacing the distributary valve itself typically ranges from $80 to $200 for the part alone, with additional labor costs of $100 to $250 depending on your location and service provider. Control board replacement, if needed, can push the total cost higher.

Related Thor Kitchen dishwasher codes

All Thor Kitchen dishwasher codes

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

Get Started

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