Bosch Oven Error Codes and Troubleshooting
Bosch is a multinational technology and engineering corporation set in Gerlingen, Germany. The company was founded by Robert Bosch, and 92% of its shares belong to the Robert Bosch Stiftung Charity. One that focuses on funding cultural and scientific discoveries to help advance Robert Bosch’s work.
Focused on offering a wide range of appliances that cover commercial buildings, airport facilities, entertainment, automotive industry, railways and train stations, mining facilities, and hotel facilities. Mainly focusing on home appliances, vehicles, and power tools the company is ready to take over the world.
Bosch might be a leading oven manufacturer but is not free from errors. Errors are a common occurrence in appliances and can be fixed without scratching your head. Simply note down the error code showing on your Bosch oven screen and check out the error type. To help make the process simpler we have listed down some of the most common error codes for Bosch Ovens.
Built-in Wall Ovens, 800 Series
The information in this section will be helpful when troubleshooting, diagnosing, and resolving faults and other issues affecting the normal operation of the oven. Additional error code information and suggested repair actions can be found in the following table.

Built-in Wall Ovens, 500 Series Codes
- C01 Audible signal duration upon completion of a cooking time or timer duration.
- C02 Amount of time until a setting is applied.
- C03 Button tone that sounds when a button is touched.
- C04 Brightness of the display illumination.
- C05 Display time of day.
- C06 Enable childproof lock activation?
- C07 Interior lighting on when appliance in operation?
- C08 Cooling fan run-on time.
- C09 Telescopic rails retrofitted?
- C10 Sabbath mode available?
- C12 Reset all values to factory settings?
Error messages on the display
If an error message with “E” appears on the display, e.g. E05-32, touch the ‘timer’ button. This will reset the error message. Reset the time, if necessary. If the fault was a one-off, you can continue to use your appliance as normal. If the error message appears again, call our after-sales service and quote the exact error message and the E no. of your appliance.
Maximum operating time
If you do not change the settings on your appliance for several hours, the appliance will stop heating automatically. This prevents unintentional continuous operation. When the maximum operating time is reached depends on the various different settings that have been configured on the appliance.
Maximum operating time reached: F8 appears on the display. Turn the function selector to the “Off” position. You can configure new settings if required.
Bosch Built-in Oven Basic Setting
There are various settings available to you in order to help use your appliance effectively and simply. You can change these settings as required. Depending on the features of your appliance, not all basic settings will be available.
Control Panel

Troubleshooting
If a fault occurs, there is often a simple explanation. Before calling the after-sales service, please refer to the fault table and attempt to correct the fault yourself. You can often easily rectify technical faults with the appliance yourself.
Trouble | Possible Cause |
---|---|
The settings on the appliance cannot be configured. A key symbol has lit up on the display or SAFE. | The childproof lock is activated. Deactivate the childproof lock by pressing and holding the button with the key symbol for approx. 4 seconds. |
The appliance door will not open. A key symbol has lit up on the display. | The appliance door is locked with the childproof lock. Deactivate the childproof lock by pressing and holding the button with the key symbol for approx. 4 seconds. The lock can be switched off in the basic settings. |
After an operating mode is switched on, h is flashing on the display. | The appliance has not cooled down sufficiently. Switch off the appliance, allow it to cool down and switch on the operating mode again. |
The appliance is not heating. The colon is flashing on the display. On some appliances, a 'd' will also appear on the display. | Demo mode is activated. Briefly disconnect the appliance from the mains (switch off the circuit breaker in the fuse box) and then deactivate demo mode within approx. 5 minutes by changing the basic setting c13 or cb to 0. |
The appliance door will not open. A lock symbol 'LOCK' has lit up on the display. | The appliance door is locked by the cleaning function. Wait until the cooking compartment has cooled down and the lock symbol 'LOCK' has gone out. |
The time is flashing on the display. | Power failure. Reset the time. |
The appliance is not working. | -Defective circuit breaker. Check the circuit breaker in the fuse box. -Power failure. Check whether the kitchen light or other kitchen appliances are working. |
Types Of Heating And Functions

Manuals
Oven Instruction Manual HBG634B.1B PDF
Built-in Oven Instruction Manual HBA574B.0A PDF
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