Clean/San.
Bosch Dishwasher Active + Clean / Active + Sanitized — Combined Signal Error
When the Active light appears illuminated or flashing at the same time as Clean or Sanitized, your Bosch dishwasher is signaling a specific error state — this combination is not part of normal operation. Unlike each light on its own (which are simple status indicators), the combination means the control board has detected an inconsistency it can't resolve on its own, such as a cycle that stopped mid-run but still registered a completion flag, or a sensor conflict. Start with a hard reset — unplug for 1 full minute — which clears many instances of this. If the combination returns, the control board needs to be read with a diagnostic tool.
What This Combined Signal Means
Each of Bosch's status lights — Active, Clean, Sanitized — is designed to represent a distinct, mutually exclusive state of the wash cycle: running, finished, or sanitize-verified. When two of them light up at once, particularly Active paired with Clean or Sanitized, the control board is showing you a state that shouldn't normally be possible under regular operation.
This typically points to a communication or logic fault between the board and one of its monitored circuits — for example, the board may have registered the cycle as "complete" (triggering Clean or Sanitized) while also still holding the "Active" flag from an interrupted or abnormally-ended cycle. It can also occur after a power interruption mid-cycle, where the board's internal state didn't reset cleanly.
Because this combination sits outside Bosch's normal signaling logic, there isn't a single universal cause — a proper diagnosis requires reading the control board's internal fault memory with diagnostic equipment to see what specific condition it recorded.
Common Causes — Most Likely First
What to Do — Step by Step
Note exactly which two lights are on
Confirm whether it's Active + Clean or Active + Sanitized, and whether they're steady or flashing. This detail helps a technician diagnose faster if the reset doesn't clear it.
Perform a hard reset
Unplug the dishwasher (or trip its breaker) for a full 1 minute, then restore power. This clears the control board's volatile memory and resolves the majority of one-off instances of this fault, especially those caused by a recent power interruption.
Run a normal wash cycle to test
Start a standard cycle and let it run uninterrupted. If it completes and shows the expected single completion light, the reset resolved the issue.
If it returns, book a technician
A recurring combined-signal state usually points to an underlying control board issue that needs to be read with Bosch's diagnostic tool to identify the specific fault code stored in the board's memory.
When to Call a Technician
Book a professional diagnosis if:
- The combined signal returns after a full hard reset
- Cycles are stopping partway through or not completing consistently
- You notice unusual noises, smells, or performance alongside the signal
- This is happening repeatedly, not as a one-time event after a power outage
Repair Cost Expectations
Hard Reset (Most Cases)
Control Board Diagnosis
Confusing Light Combination? We'll Read the Board.
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Frequently Asked Questions
Can I keep using my dishwasher with this signal showing?
You can try a hard reset and run a test cycle. If the combined signal doesn't return and the cycle completes normally, it's safe to continue using. If it returns, avoid repeated cycles until diagnosed, since the underlying inconsistency isn't resolved.
Is this the same as the 4 LEDs + beeping critical error?
No. 4 LEDs + beeping is a distinct alarm pattern for serious faults like leaks or heating failure. Active + Clean/Sanitized is a status light conflict — less urgent, but still not a normal operating state and worth investigating if it persists.
Will a hard reset erase any settings?
No. A hard reset (unplugging for a minute) only clears the current cycle state and any stored fault flags — it doesn't affect saved preferences like your default cycle or delay start settings.
How much does board diagnosis typically cost?
In the Boston area, diagnosing and repairing a control board fault typically runs $150 to $400 depending on whether the board needs a repair or full replacement, parts and labor included.
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