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.

When those two boards stop talking, your dishwasher is basically a very expensive paperweight. I see this code mostly after kitchen renos where the machine got bumped, or on 5-7 year old units where steam finally got to the ribbon cable connector. The loose connector fix is free and takes ten minutes. But if it's an actual board failure, you're looking at $200-400 depending on which board died.

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

What Does the E92 Code Mean?

OK here's the deal with E92: Bosch splits the brain of the dishwasher into two boards, and they've got to constantly talk to each other. When that conversation goes silent, everything locks up. The good news is roughly a third of these are just a loose or corroded cable, and you can fix that in twenty minutes with a Torx screwdriver. The bad news is when it's an actual board failure, parts are $150-260 apiece and Bosch doesn't make them easy to source.

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 pops up on the display right when you power it on, or it kills a cycle dead halfway through with no warning
Every button on the control panel is completely dead, you push them and nothing happens at all
Display shows E92 but no program buttons respond, like the machine can report the problem but can't actually do anything else
Code showed up the morning after a lightning storm or right after the power blinked
Machine worked perfectly, you pulled it out to do some work under the sink, pushed it back in, and now it's throwing E92 every single time

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

Go to your breaker box and flip the dishwasher's circuit off. Leave it off for a full 60 seconds, not just 10, so the capacitors on the boards have time to drain completely. Flip it back on and don't press anything for about 30 seconds while the boards initialize. If E92 was a one-time glitch or power hiccup, it might clear on its own. If the code comes right back within a minute or two, you've got actual hardware damage and a reset isn't going to do anything for you.

Tools Required for Diagnosis

Torx T20 screwdriverNon-contact voltage testerMultimeterElectrical contact cleanerFlashlight or headlampSmall flathead screwdriver (for releasing ribbon cable locking tabs)

Diagnostic Checklist

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

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	OEM Number	Estimated Price
Main Control Board (PCB)00708350 · $120–$260	00708350	$120 – $260
User Interface Board00708399 · $80–$160	00708399	$80 – $160
Ribbon Cable / Wire Harness00611244 · $15–$35	00611244	$15 – $35

Frequently Asked Questions

Is E92 fixable at home?

Yeah, often. About 30% of E92 faults come down to a loose or corroded ribbon cable connector, and that costs nothing to fix beyond ten minutes of work and maybe a $6 can of contact cleaner. If one of the boards actually failed, home repair is still doable but you're buying a $120-260 part and doing a board swap. That's not technically hard, it's basically unplugging the old board and plugging in the new one, but you do need the exact right part number for your specific model because Bosch doesn't play nice with cross-compatibility. Order wrong and you're doing a second return.

What's the difference between E92, E92-40, and E92-10?

E92 is the general 'these two boards stopped talking' code. E92-10 specifically points the finger at the UI board as the one that went quiet. E92-40 usually shows up after a board replacement where the new board wasn't programmed with the right firmware for your model. So if you're seeing E92-40 and you've never replaced a board, treat it like a standard E92 and start with the cable connections. If you replaced a board recently and now you're seeing E92-40, you probably got the wrong firmware version or a part that wasn't compatible with your specific model year.

How much does a Bosch control board cost?

OEM main control boards run $120-260 depending on which series you have. The UI board is usually $80-160. Aftermarket options exist but Bosch board compatibility is finicky enough that I'd stick with OEM or at least a seller who lists exact model compatibility on their listing. Some sellers offer pre-programmed boards specific to your model number, which is the safest route if you're not sure about firmware. On SHPM88-series units I replaced three of these boards last year and the OEM parts ran about $185 each for the main PCB from AppliancePartsPros.

Can moisture cause E92?

Yes, and it's more common than people think. Steam from the hot wash cavity rises up into the door during and after every cycle. Over years, that moisture deposits mineral scale on the ribbon cable connector contacts. The scale builds up resistance in the communication signal until the boards just can't hear each other anymore. White powder or a green tint on the connector is the giveaway. The fix sounds simple but once you're seeing that level of corrosion, the cable itself is usually compromised too, so cleaning the contacts is a short-term solution at best. Budget for a cable replacement while you're in there.

E92 showed up after a power surge, what do I do?

Start by visually inspecting both boards for burn marks or swollen capacitors. Surges usually hit the main PCB first since it's closer to the power input on the machine. If you see visible damage on the main board, that's your part to replace. If both boards look clean visually, try the hard reset (60 seconds at the breaker) before spending any money, because sometimes a surge just scrambles the board's memory and a reset clears it right up. And seriously, once you fix it, plug the dishwasher into a surge protector. A $25 surge protector is a lot cheaper than a $200 board.

Related Bosch Dishwasher Error Codes

Code: E92-40Bosch E92-40: Board Configuration Mismatch Code: E92-10Bosch E92-10: User Interface Board Not Responding Code: E01Bosch E01 Error: What's Wrong with the Motor Circuit Code: DIAGHow to Enter Bosch Dishwasher Diagnostic Mode Code: 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.

Bosch dishwasherHow to Reset a Bosch Dishwasher (Every Method)Bosch dishwasherBosch E09: Heating Element Not Working Bosch dishwasherBosch E17 Error: Too Much Water Coming In Bosch dishwasherBosch E11 Error: Temperature Sensor (NTC) Fault Bosch dishwasherBosch Dishwasher Troubleshooting: 15 Problems, Fixed Bosch dishwasherBosch E92-40: Board Configuration Mismatch

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

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026