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Bosch E92 Error: Control Board Communication Fix

Quick Answer

Bosch E92 means the two boards inside your dishwasher - the main control board (PCB) and the user interface board (UI) - have lost communication. This is one of the more serious Bosch codes. Before assuming board replacement, check the ribbon cable and wire harness connectors between the boards.

Bosch E92 means the two boards inside your dishwasher - the main control board (PCB) and the user interface board (UI) - have lost communication. This is one of the more serious Bosch codes. Before assuming board replacement, check the ribbon cable and wire harness connectors between the boards. A corroded or loose connector is the cause in roughly 30% of E92 cases and is a cheap fix. If both boards are confirmed good, E92 typically requires replacing the main PCB.

BoschDishwasherSeverity: highDifficulty: advanced60% DIY Success
Time to Fix
30–240 min
Difficulty
advanced
Parts Cost
$15 – $260
Tools Needed
Torx T20 screwdriver, Non-contact voltage tester
Wrong code?

Not seeing E92 on your display?

Select what your appliance is actually doing and we'll take you to the right guide.

board configuration mismatch after replacement
E92-40
UI board not communicating with main board
E92-10
wash motor electrical fault
E01
accessing diagnostic test program
DIAG
control panel unresponsive
HUB

What Does the E92 Code Mean?

Modern Bosch dishwashers use two separate circuit boards: a main control board that manages all cycles and components, and a user interface board behind the control panel that handles button input and the display. These boards communicate via a ribbon cable or multi-pin wire harness. When that communication fails, the dishwasher throws E92 and locks out all functions. E92-40 and E92-10 are sub-variants targeting specific communication faults.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Corroded ribbon cable connector between main PCB and UI board40%
Broken or kinked ribbon cable24%
Failed main control board (PCB)14%
Power surge damaging one or both boards12%
Failed user interface board10%

Symptoms You May Notice

  • E92 displayed on startup or mid-cycle
  • Dishwasher completely unresponsive after E92
  • Control panel partially functional but cycle will not start
  • E92 appearing after a lightning storm or power surge

Can you reset a Bosch dishwasher to clear the E92 code?

Hard reset via circuit breaker (60 seconds off) may temporarily clear E92 if caused by a transient fault. It will not fix hardware failures.

Tools Required for Diagnosis

Torx T20 screwdriverNon-contact voltage testerMultimeterElectrical contact cleaner

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Inspect and reseat the ribbon cable

Turn off the circuit breaker. Remove the inner door panel (usually 6-8 Torx screws around the perimeter). Locate the ribbon cable or multi-pin connector running between the UI board (front panel area) and the main control board (typically at the bottom of the door or behind the front kick panel). Disconnect and firmly reseat both ends of the connector. Look for bent pins, corrosion (green tint), or moisture damage.

2

Test for moisture damage on the ribbon cable

3

Check control board for burn marks

4

Attempt a diagnostic mode reset

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Main Control Board (PCB)00708350 · $120–$260
User Interface Board00708399 · $80–$160
Ribbon Cable / Wire Harness00611244 · $15–$35

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
BORDERLINE
Estimated Cost: $138 (Parts) vs $650 (New Machine)

Frequently Asked Questions

Is E92 fixable at home?
Yes, in many cases. About 30% of E92 faults are caused by a loose or corroded ribbon cable connector, which costs nothing to fix beyond a few minutes of work. If the boards themselves have failed, home repair is possible but requires ordering the correct part number for your model and basic comfort with electronics. Board swaps are not technically difficult; they are just expensive.
What is the difference between E92, E92-40, and E92-10?
E92 is the general communication failure code between the main PCB and the UI board. E92-10 is a sub-code that specifically identifies the UI board as the non-responsive party. E92-40 usually appears after a board replacement where the new board was not programmed with the correct firmware for the model. If you have never replaced a board and see E92-40, treat it as a standard E92 first and check the cable connections.
How much does a Bosch control board cost?
OEM main control boards for Bosch dishwashers typically run $120-$260 depending on model series. The UI board is usually $80-$160. Aftermarket options are cheaper but compatibility must be verified carefully by part number. Some sellers offer pre-programmed boards specific to your model, which is the safest route.
Can moisture cause E92?
Yes. Steam from the hot dishwasher interior rises into the door cavity during and after cycles. Over years, this moisture deposits mineral scale on the ribbon cable connector contacts. This corrosion increases electrical resistance in the communication circuit until the signal drops below the threshold needed for reliable communication. White powder or green tint on the connector is the giveaway.
E92 after a power surge - what now?
Power surges can damage one or both boards simultaneously. Start by visually inspecting both boards for burn marks or bulging capacitors. If the main PCB shows damage, replace it first - the UI board is less often the victim of surges since the main board is closer to the power input circuit. Installing a surge protector on the dishwasher's outlet prevents repeat incidents.

Related Bosch Dishwasher Error Codes

Code: E92-40Bosch E92-40: Board Configuration MismatchCode: E92-10Bosch E92-10: User Interface Board Not RespondingCode: E01Bosch E01 Error: What's Wrong with the Motor CircuitCode: DIAGHow to Enter Bosch Dishwasher Diagnostic ModeCode: HUBBosch Dishwasher Buttons Not Working

Same Fix Works on These Brands

Bosch shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience E92 Errors

This repair applies to most Bosch dishwashers with this error code. Common model numbers include:

SHPM88Z75N, SHPM88Z55N, SHPK7ZL55N, SHE3AR75UC, SHEM63W55N, SHPM65Z55N, SHE3AR72UC, SHDF78Z55N, SHEM78ZH5N, SHPM98Z75N

Last verified for technical accuracy on March 14, 2026