Bosch Range Error Code E104

E104 on a Bosch range means the Cavity 1 temperature sensor has shorted to ground. This is an electrical fault in the oven temperature sensing circuit. As a safety measure, the oven will stop all heating in Cavity 1 and run the cooling fan at high speed until the issue is resolved.

No, the oven is designed to stop heating when E104 is active, so normal cooking is not possible. Do not attempt to bypass or ignore the error code, as the underlying short circuit condition could cause further electrical damage if left unaddressed. The cooling fan running at high speed is a protective response, not a sign the oven is functional for cooking.

Repair costs depend on which component has failed. A replacement temperature sensor typically costs in the range of $20 to $80 for the part, while a control module can range from $150 to $400 or more. Adding labor for a professional technician generally brings the total repair cost to somewhere between $100 and $500 depending on the fault and local service rates. Getting a diagnostic estimate before authorizing major parts is always advisable.

A knowledgeable DIYer can perform basic diagnostics such as visually inspecting the sensor wiring for pinches or damage and checking connector integrity. Testing the sensor resistance requires a multimeter and some familiarity with electrical testing. However, if the wiring is damaged or the sensor itself has failed, replacement of components and working near the control module may be better handled by a qualified technician.

A power reset, such as unplugging the range or turning off the circuit breaker for a few minutes, may temporarily clear the error code display. However, if the underlying short circuit in the sensor or wiring is still present, the code will return once the oven powers back on and runs its diagnostics. A reset alone does not fix the root cause and is not a solution.