mypros+
Error code reference

Viking Dishwasher Error Code E:08

Main board communication fault

Viking codesViking dishwasher codes

Main board communication fault — communication between the main electronic board and external electronic board is lost during normal operation.

First step from the service manual

Check cable harness errors, faulty socket installation, faulty electronics, main electronic board, or display electronic board.

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 E:08.

  • 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 E:08 means on a Viking dishwasher

The E:08 error code on a Viking dishwasher indicates a communication fault between the main electronic control board and the external (display) electronic board. These two boards continuously exchange data during operation, and if that communication link is interrupted or lost, the dishwasher will halt and display E:08. The fault can be triggered by a break in the signal path at any point between the two boards, including the cable harness, connector sockets, or the boards themselves.

The most common physical causes involve the wiring harness that runs between the two boards. Connectors that are improperly seated, corroded, or damaged can intermittently break the communication signal. Vibration during normal wash cycles can also cause a marginal connection to fail over time. Inspecting each connector for secure seating, corrosion, bent pins, or chafed wiring is the recommended starting point before assuming either board has failed.

If the harness and connectors check out physically and electrically, the fault likely resides in one of the two electronic boards. Either the main control board or the display board may have a failed communication circuit, a damaged microprocessor, or a component failure that prevents proper data transmission. In these cases, component-level board testing or board replacement is required to resolve the error.

Source: manufacturer service documentation.

Common causes of E:08

  1. 01

    Loose or improperly seated cable connector

    Wiring / connection

    The harness connector between the main board and display board may have worked loose due to vibration or was never fully seated. Check each connector for a firm, click-locked fit.

  2. 02

    Damaged or chafed wiring harness

    Part replacement

    The cable harness running between the two boards can develop breaks, pinches, or chafed insulation that interrupt the communication signal. Visually trace the harness for any visible damage.

  3. 03

    Corroded or damaged connector socket

    Part replacement

    Moisture inside the dishwasher can cause corrosion on the connector pins or socket contacts, increasing resistance and breaking the signal path. Inspect pins for greenish corrosion or physical deformation.

  4. 04

    Failed display electronic board

    Part replacement

    The display board may have an internal component failure that prevents it from communicating with the main board. If wiring checks out, the display board is the next likely suspect.

  5. 05

    Failed main electronic control board

    Part replacement

    The main control board itself can fail in a way that disrupts communication output to the display board. This is typically diagnosed after ruling out wiring faults and display board issues.

See the test procedure for each cause

Frequently asked questions about E:08

What does E:08 mean on a Viking dishwasher?
E:08 indicates a communication fault between the main electronic control board and the external display electronic board. The dishwasher detects that the data link between these two boards has been lost during normal operation and shuts down to prevent further issues. The cause can be a wiring harness problem, a faulty connector, or a failure in one of the two boards.
Can I fix the E:08 error myself?
A homeowner with basic appliance knowledge can start by checking that all visible wire harness connectors are firmly seated and free of obvious damage. However, if the error persists after checking connections, diagnosing or replacing the main control board or display board requires technical skill and should be handled by a qualified technician. Working around dishwasher electronics also involves the risk of electric shock if the unit is not properly disconnected from power first.
Is it safe to use my Viking dishwasher while E:08 is displayed?
No, you should not attempt to run the dishwasher while E:08 is active. The error indicates that the control system has lost communication between its key boards, meaning the machine cannot reliably manage the wash cycle. Continuing to operate it in this state could lead to unpredictable behavior or incomplete cycles.
Will resetting the dishwasher clear the E:08 error?
A power reset by disconnecting the dishwasher from its power source for several minutes may temporarily clear the error if the fault was caused by a transient electrical glitch. However, if the underlying cause is a loose connector, damaged harness, or failed board, the error will return once the unit is powered back on and communication is attempted again. A reset alone is not a repair.
How much does it cost to repair a Viking dishwasher E:08 error?
Repair costs vary depending on the root cause. If only the wiring harness or a connector needs replacement, costs are generally lower, typically in the range of $75 to $200 including labor. If the display board or main control board requires replacement, parts alone can range from $150 to $400 or more, with total repair costs potentially reaching $300 to $600 depending on the technician and parts pricing in your area.

Related Viking dishwasher codes

All Viking dishwasher codes
View all 101 Viking dishwasher codes

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

Get Started

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