There are two main possibilities:

1. Voltage Problem: In some models, the F13 error indicates a problem with the mains voltage supply. This could be:

• High voltage: If the voltage coming from your outlet is higher than the machine can handle, it can trigger the F13 error as a safety precaution.
• Low voltage: Similarly, if the voltage is too low, the machine might not function properly and display the F13 error.

2. Sensor Fault: In other models, the F13 error might signify a fault with a specific sensor. This could involve:

• Thermistor (NTC): This sensor measures water temperature, and a malfunction could lead to the F13 error.
• Pressure sensor: This sensor monitors water pressure within the machine, and an issue with it could trigger the F13 code.
• Other sensors: Depending on the model, other sensors responsible for drum position, turbidity, or flow might also cause the F13 error if they malfunction.

Troubleshooting the F13 error code in Bosch Washing Machine

It's important to avoid DIY troubleshooting due to the potential for electrical hazards and complexities involved.

Recommended Action:

1. Contact Bosch customer service immediately: Inform them of the F13 error code and your model number. They can provide expert advice based on your specific machine and suggest solutions like scheduling a qualified technician visit for safe diagnosis and repair.
2. Do not attempt to reset the machine: While resets help with some errors, it's not recommended for F13 as it might not resolve the underlying issue and could potentially worsen it.
3. Leave the machine unplugged: As a safety precaution, unplug the machine from the power outlet until a qualified technician can assess the issue.

Additional Tips:

• Having your model number readily available when contacting customer service will expedite the process.
• If you suspect a high or low voltage issue, you can use a multimeter to measure the voltage coming from your outlet. However, always prioritize safety and consult a qualified electrician if needed.
• Remember, safety is paramount. Leave the diagnosis and repair to qualified professionals to ensure your Bosch washing machine is fixed correctly and operates safely again.

I hope this information helps!