Bosch ovens are known for their advanced technology, reliability, and sleek design. However, like all appliances, they can encounter issues from time to time. One of the most frustrating problems is when your Bosch oven displays an error code. These error codes are often cryptic, and if you don't know what they mean, it can leave you scratching your head.

In this detailed guide, we will explain what these Bosch oven error codes mean, how to interpret them, and, most importantly, how to fix them. We will cover common issues such as temperature sensor failures, door lock problems, control board errors, and more. By the end of this guide, you will have a clear understanding of how to troubleshoot these errors yourself, as well as when it’s time to call in a professional.

Why Bosch Oven Error Codes Appear

Bosch oven error codes typically appear when the appliance detects a fault in one of the key components. These components may include temperature sensors, control buttons, door locks, wiring, or the control board itself. When an issue occurs, the oven triggers an error code to alert the user about the underlying problem.

Each error code corresponds to a specific issue, and understanding the error codes can help pinpoint exactly what needs to be fixed. Whether it's an overheating issue, a faulty temperature sensor, or a problem with the oven's door lock, these error codes act as diagnostic tools to help you understand and resolve the issue.

Common Bosch Oven Error Codes & Fixes

E011 / F011 – Stuck or Faulty Control Button

Meaning: The E011 or F011 error code appears when a button on the control panel is stuck or continuously sending a signal. This is often caused by a malfunctioning control button or moisture buildup in the control panel.

Symptoms:

• The oven won’t respond to commands.
• The error code displays on the control panel.
• Certain buttons remain unresponsive or are stuck.

How to Fix:

• Clean the Control Panel: Use a soft cloth and mild cleaning solution to gently clean the control panel. Dirt or moisture buildup can cause buttons to stick.
• Power Off and Reset: Power off the oven for about 5 minutes to reset the control board. This may help clear any temporary glitches.
• Replace the Control Panel: If the error persists, you may need to replace the control panel or button assembly. This is often required when the panel has sustained physical damage or internal wear.

E115 / F115 – Oven Overheating

Meaning: The E115 or F115 error code typically appears when the oven’s temperature exceeds safe limits. This is an overheating error, usually caused by a malfunctioning temperature sensor or cooling fan failure.

Symptoms:

• The oven overheats during use, often triggering a shutoff.
• The oven display shows the E115 or F115 error code.
• No heat is generated after the code appears.

How to Fix:

• Allow the Oven to Cool: Turn off the oven and allow it to cool completely before attempting any further troubleshooting.
• Check the Temperature Sensor: Inspect the temperature sensor for damage, and test it for proper resistance using a multimeter. A faulty sensor may give incorrect readings, causing the oven to overheat.
• Inspect the Cooling Fan: Verify that the cooling fan is operating correctly. A stuck or broken fan can lead to overheating. Clean any dust or debris blocking the fan, or replace it if necessary.
• Replace the Sensor or Control Board: If the sensor and fan are functioning properly, but the error persists, consider replacing the control board or sensor.

E118 / F118 – Temperature Sensor Error

Meaning: The E118 or F118 error code typically appears when the oven cannot read the temperature sensor correctly. This error can occur due to sensor failure, wiring issues, or communication problems between the sensor and the control board.

Symptoms:

• The oven cannot reach the desired temperature.
• Temperature fluctuates or the oven won’t heat to the set temperature.
• The error code appears in the oven display.

How to Fix:

• Test the Oven Temperature Sensor: Use a multimeter to test the temperature sensor for the correct resistance. Bosch temperature sensors should have a specific resistance range. If the reading is incorrect, the sensor is faulty and needs to be replaced.
• Check Wiring Connections: Inspect the sensor wiring for loose connections or damaged wires. Reconnect or replace damaged wiring.
• Replace the Sensor: If the sensor is faulty and no wiring issues are found, replace the sensor. A malfunctioning sensor will not provide accurate readings, which can cause issues with the oven’s temperature regulation.

E305 / F305 – Door Lock Problem (Self-Clean Models)

Meaning: The E305 or F305 error code appears when the door lock mechanism fails to engage or disengage properly. This is particularly common in self-cleaning Bosch ovens that require the door to be locked during the cleaning cycle.

Symptoms:

• The oven door will not lock or unlatch properly.
• The self-cleaning cycle cannot be initiated or completed.
• The error code appears on the control panel.

How to Fix:

• Turn Off Power: Power off the oven and allow it to cool completely. Never attempt to force open a locked door during a cleaning cycle.
• Inspect the Door Lock Motor and Switch: Check the door lock motor and switch for any visible damage or obstruction. Sometimes, dirt or grease buildup can prevent the lock from functioning properly.
• Replace the Door Lock Mechanism: If the motor or switch is damaged, it may need to be replaced. This can usually be done by removing the oven’s inner door panel to access the lock mechanism.

E900 / F900 – Control Board Communication Failure

Meaning: The E900 or F900 error code indicates that the main control board is not communicating correctly with other components of the oven.

Symptoms:

• The oven fails to respond to commands.
• The error code appears when the oven is powered on or when specific functions are used.

How to Fix:

• Perform a Power Reset: Unplug the oven or turn off the circuit breaker for 5–10 minutes. This allows the system to reset and may clear the communication error.
• Inspect Wiring Harness: Check the wiring harness connected to the control board for loose or damaged wires. Reconnect or repair the wiring if necessary.
• Replace the Control Board: If the error persists, it could indicate a faulty control board that requires replacement. Ensure you use a genuine Bosch replacement part.

Power & Wiring Related Errors

E005 / F005 – Power Supply or Wiring Issue

Meaning: The E005 or F005 error code indicates a power supply or wiring problem, which could affect the oven’s ability to function properly.

Symptoms:

• Oven fails to power up or heat properly.
• The oven displays a power-related error code.

How to Fix:

• Check Outlet Voltage: Ensure the oven is receiving the correct voltage (220–240V for Bosch ovens). Test the outlet using a voltmeter.
• Inspect Power Cord and Internal Wiring: Check the power cord for any damage. Inspect internal wiring connections for loose or damaged wires.
• Reset Circuit Breaker: Reset the circuit breaker to ensure the oven receives full power. If the circuit breaker trips again, you may need to consult an electrician.

Quick Diagnostic Checklist

• Power reset performed
• Oven cooled before restart
• Sensor wiring intact
• The door lock moves freely
• Cooling fan operates normally
• Ventilation and airflow pathways are clear

When to Call a Technician

While many Bosch oven error codes can be resolved with basic troubleshooting, sometimes the issue is more complex and requires professional intervention. Call a technician if:

• The error code returns after resetting.
• The control board or wiring seems damaged.
• The self-cleaning door lock mechanism remains stuck.
• The oven overheats repeatedly or shuts down during operation.

Commonly Asked Questions About Bosch Oven

Q1: Why does my Bosch oven show error codes like E011 or F011?

The E011 or F011 error code typically appears when a control button on the panel is stuck or malfunctioning, often due to dirt or moisture buildup. The oven may not respond to commands, or certain buttons may remain unresponsive. To fix this, clean the control panel with a mild cleaning solution and power off the oven for 5 minutes to reset the control board.

Q2: What causes the Bosch oven to display error codes E115 or F115 (oven overheating)?

The E115 or F115 error code indicates that the oven temperature has exceeded safe limits, often due to a faulty temperature sensor or cooling fan failure. To fix this, turn off the oven to allow it to cool, check the temperature sensor for damage, and verify that the cooling fan is working properly. If the issue persists, the sensor or control board may need replacement.

Q3: How can I fix the Bosch oven temperature sensor error (E118/F118)?

The E118 or F118 error code occurs when the oven cannot read the temperature sensor correctly, often due to a faulty sensor or wiring issues. To fix this, test the sensor for the correct resistance using a multimeter. If the reading is incorrect, replace the sensor. Additionally, inspect the wiring connections to ensure there are no loose or damaged wires.

Q4: Why does my Bosch oven show E305 or F305 (door lock problem)?

The E305 or F305 error code appears when the door lock mechanism fails to engage or disengage properly, especially in self-cleaning ovens. The door must lock securely during the cleaning cycle. To fix, turn off the oven and allow it to cool. Inspect the door lock motor and switch for visible damage or obstructions. If needed, replace the door lock mechanism.

Q5: What is the E900/F900 error code on my Bosch oven?

The E900 or F900 error code indicates a communication failure between the main control board and other oven components. To resolve this, try performing a power reset by unplugging the oven for 5–10 minutes. If the error persists, check the wiring harness for loose or damaged connections. If the wiring is fine, the control board may need to be replaced.

Q6: How do I fix a power supply or wiring issue in my Bosch oven (E005/F005)?

The E005 or F005 error code signals a power supply or wiring issue. This could prevent the oven from heating or functioning properly. Start by checking the outlet voltage using a volt meter to ensure the oven is receiving 220–240V. Inspect the power cord for any damage, and check for loose or damaged wiring inside the oven. Reset the circuit breaker if needed.