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Error code reference

Bosch Dishwasher Error Code 11

Synchronisation error; power frequency error or low voltage.

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What the 11 error code actually means

Your Bosch dishwasher detected a problem with the electrical power coming into the machine, specifically that the voltage was too low or the power frequency was unstable. This is often caused by an issue with your home's electrical supply rather than the dishwasher itself. Check whether other appliances on the same circuit are working normally and contact an electrician if you suspect a wiring or power problem.

Diagnostic procedure

The full 11 procedure

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First diagnostic step
Check power supply frequency and voltage levels.
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Most common causes of 11

Ranked by how often they cause this code
  1. 1Low supply voltage or brownout
  2. 2Loose or degraded wiring connection
  3. 3Overloaded electrical circuit
  4. 4Failing or undersized circuit breaker
  5. 5Faulty main control board

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Questions people ask about 11

What does 11 mean on a Bosch dishwasher?
Error code 11 on a Bosch dishwasher signals a synchronisation error related to the incoming power supply. The control board has detected that the AC power frequency is out of the expected range or that the supply voltage has dropped too low. This fault is designed to protect the dishwasher's electronics from damage caused by unstable power conditions.
Is error code 11 on a Bosch dishwasher dangerous?
The error code itself is a protective fault, meaning the dishwasher has stopped operation to avoid damage. However, the underlying cause, such as low voltage from faulty wiring or a failing breaker, can represent a genuine electrical hazard. It is advisable to have a licensed electrician inspect the circuit if you cannot identify an obvious external cause.
How much does it cost to repair a Bosch dishwasher showing error code 11?
If the issue is limited to a loose wiring connection or an overloaded circuit, the cost may be minimal, potentially just a service call fee in the range of $75 to $150. If a circuit breaker needs replacement, expect electrical repair costs of $150 to $300 depending on your location and electrician rates. A main control board replacement, if required, typically adds $200 to $450 in parts and labor.
How do I fix error code 11 on my Bosch dishwasher?
Start by measuring the voltage at the wall outlet using a multimeter to confirm the supply is within the normal range. Check that the circuit breaker is fully seated and that no wiring connections are loose at the outlet or panel. If the power supply tests as normal and the error persists after a reset, the main control board may need to be inspected or replaced by a qualified technician.
Will resetting my Bosch dishwasher clear error code 11?
A reset may temporarily clear the code, but if the power supply issue has not been resolved, the error will return once the dishwasher attempts to run. Resetting is useful for confirming whether the fault was caused by a temporary power fluctuation, but it is not a permanent fix if the root electrical problem remains.

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