Miele Oven Error Code F134

F134 means the oven's control electronics have detected a temperature reading from the cavity sensor that is higher than the acceptable operating range. This points to either a defective cavity temperature sensor or a fault in the control and display electronics. The oven displays this code to prevent unsafe operation. Allowing the unit to cool and retesting is the recommended first step.

No, you should not continue using the oven while F134 is active. The code indicates either a sensor or control board fault that prevents the oven from reliably monitoring its own temperature. Operating the oven in this condition could result in uncontrolled overheating. Allow the appliance to cool and have it inspected before using it again.

Repair costs depend on which component has failed. Replacing a cavity temperature sensor is generally the less expensive repair, with parts and labor typically ranging from around $150 to $350. If the control or display electronic board needs replacement, costs can range from roughly $350 to $700 or more depending on the specific board and labor rates in your area. Getting a diagnostic assessment first will help clarify which part is at fault before committing to a repair.

A knowledgeable DIYer can start by allowing the oven to cool completely and checking whether the code clears on restart. Inspecting wiring connections to the temperature sensor is also a reasonable DIY step. However, accurately testing the sensor's output and diagnosing whether the control board has failed typically requires proper tools and technical knowledge, so professional service is recommended if the fault persists.

A reset or power cycle may temporarily clear F134 if the oven genuinely overheated and has since cooled down. However, if the fault is caused by a defective temperature sensor or a failing control board, the code will return once the oven is used again. A persistent F134 after cooling and resetting indicates a hardware component needs to be tested and likely replaced.