Bosch Range Error Code ER13

ER13 indicates that the electric cooktop's MTwisT control module has detected invalid or corrupt data in its EPROM memory chip. The EPROM stores the configuration and calibration data the control system needs to operate. When this data is unreadable or fails integrity checks, the cooktop displays ER13 and disables normal operation. This fault typically requires control board replacement to resolve.

The cooktop portion of the range is likely disabled or unreliable while ER13 is active, as the control system cannot verify it has valid operating parameters. Attempting to use the cooktop in this condition is not recommended, as the control module may not correctly regulate power to the heating elements. The oven function on the range may still operate independently depending on the model.

A power reset by turning off the circuit breaker for several minutes can sometimes clear ER13 if the corruption was caused by a temporary power interruption rather than a hardware failure. If the code clears and does not return, normal operation may resume. However, if the EPROM itself is faulty or the data corruption is permanent, the error will reappear after reset and the control board will need to be replaced.

A basic power reset by unplugging the unit or cycling the circuit breaker for a few minutes is worth attempting first, as it may clear the code if the corruption was caused by a one-time power interruption. However, if the EPROM data is genuinely corrupted or the memory chip has failed, the fault will return because the underlying hardware cannot be reprogrammed in the field. Replacing the MTwisT control board is the standard repair for a persistent ER13 error.

Repair costs typically depend on whether the control board can be sourced and whether you use a professional technician or attempt the repair yourself. Control board parts for Bosch electric cooktops generally range from around 150 to 400 dollars depending on the specific model. Professional labor for diagnosis and board replacement adds roughly 100 to 200 dollars on top of parts costs.