Bosch Oven Error Code F155

F155 indicates a corrupted EEPROM, which is the memory chip on the Display Board that stores the oven's cooking parameters and configuration data. When this memory becomes corrupted or fails a checksum check, the oven flags F155 to prevent unreliable operation. If the error appears at power-up, it may be a minor issue clearable with the Cancel key. If it appears when starting a cooking mode, the Display Board requires replacement.

If F155 appears at power-up and clears after pressing Cancel, the oven can generally be used with caution, but you should monitor for the error recurring during cooking. If F155 appears when starting a cooking mode, the oven should not be used for cooking until the Display Board is replaced, since corrupted cooking parameters could result in inaccurate temperature control or unexpected behavior during a cycle.

A knowledgeable DIYer comfortable working with appliance electronics can replace the Display Board, as it typically involves disconnecting wire harness connectors and removing mounting screws. However, it is important to disconnect power to the oven at the circuit breaker before beginning any work. Sourcing the correct replacement board for your specific Bosch model number is essential, as boards are model-specific due to the unique EEPROM programming they carry.

A reset using the Cancel key can clear F155 if the error appears only at power-up, as this suggests a benign checksum issue caused by a power fluctuation. However, if F155 reappears each time you attempt to start a cooking mode, the reset will not resolve the underlying EEPROM corruption. In that case, the Display Board must be replaced to restore cooking functionality.

If the error clears with the Cancel key at power-up, there is no parts cost involved. If the Display Board requires replacement, parts costs typically range from roughly 150 to 400 dollars depending on the specific model, with additional labor charges if a technician performs the repair. Total repair costs including labor generally fall in the range of 250 to 550 dollars.