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Error code reference

Bosch Dishwasher Error Code S3

No faults detected (Apexx SH_99 full text display).

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What the S3 error code actually means

The S3 code on your Bosch dishwasher is actually good news. It means the dishwasher ran a self-check and found no problems. You do not need to call a repair technician or do anything to fix it.

Diagnostic procedure

The full S3 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of S3

Ranked by how often they cause this code
  1. 1Routine diagnostic self-check completion
  2. 2Technician-initiated diagnostic mode
  3. 3Intermittent fault that has cleared

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Questions people ask about S3

What does S3 mean on a Bosch dishwasher?
S3 is a status code specific to Bosch dishwashers equipped with the Apexx SH_99 full text display. It means the control system ran a diagnostic check and found no faults or errors in any monitored system. It is not an error code and does not indicate a problem. No repair or service action is required when S3 is displayed.
Is it safe to run my Bosch dishwasher when S3 is displayed?
Yes, it is completely safe to operate your dishwasher when S3 is displayed. The code confirms that no faults were detected, meaning the machine is cleared for normal use. There are no unsafe conditions associated with this status readout.
How much will it cost to repair a Bosch dishwasher showing the S3 code?
There is no repair cost associated with the S3 code because it indicates no fault is present. If a technician was called and S3 is the only code found, you may still be charged a standard diagnostic or service call fee, which typically ranges from $75 to $150 depending on your location and the service provider.
How do I fix the S3 code on my Bosch dishwasher?
No fix is needed for the S3 code. It is a no-fault status indicator, meaning the dishwasher's self-diagnostic system found everything operating correctly. If you are seeing S3 but your dishwasher is still performing poorly, the underlying issue may be intermittent and should be diagnosed through hands-on functional testing.
Will resetting my Bosch dishwasher clear the S3 code?
The S3 code does not need to be cleared because it is not a fault. It is a normal diagnostic status message. If S3 appears after a reset, that simply means the reset completed successfully and the machine found no errors during its post-reset self-check.

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