Bosch Oven Error Code E302

E302 means the temperature sensor on the control module has detected that the module itself is running too hot. The oven responds by shutting off all heating elements and running the cooling fan at full speed. This is a protective shutdown designed to prevent damage to the control electronics. The fault needs to be diagnosed before the oven will operate normally again.

No. The oven has shut off the heating elements as a safety response, so it will not cook normally while E302 is active. Attempting to bypass or ignore the fault and continue using the oven risks damaging the control module or other electronic components from sustained overheating. The underlying cause should be resolved before resuming normal use.

Repair costs vary depending on which component is at fault. Clearing a ventilation obstruction or reseating a connector may cost little beyond a service call fee, typically in the range of $75 to $150. Replacing a cooling fan generally runs $100 to $250 in parts and labor combined. If the control module itself needs replacement due to a stuck relay or internal damage, costs can range from $300 to $600 or more depending on the specific model and labor rates in your area.

Some causes of E302 are accessible to a knowledgeable DIYer. Checking for blocked ventilation trims, clearing obstructions, and inspecting wiring connectors at the cooling fan do not require special tools. However, diagnosing a stuck relay or replacing the control module involves working with high-voltage components and should be handled by a qualified technician if you are not comfortable with appliance electrical systems.

A power reset by unplugging the oven or switching off the circuit breaker for a few minutes may temporarily clear the code if the module has cooled down sufficiently. However, if the root cause, such as a failed cooling fan, blocked vents, or a stuck relay, has not been corrected, the code will return once the oven is used again and the module temperature climbs back above the limit.