E305Bosch Oven — Bosch Oven E305 Error Code

E305 is one of the most common Bosch oven error codes and indicates the control board cannot detect a proper connection across the baseplate heating circuit. This typically points to a failed bake element, a tripped or blown thermal cutout, or a wiring fault in the heating circuit. In some cases, a power cycle clears E305 if it was caused by a transient electrical event. Persistent E305 usually requires element or fuse replacement.

First, try a power cycle: turn off the breaker for 5 minutes and restore power. If E305 returns, inspect the bake element at the bottom of the oven for visible damage — burn marks, cracks, or blistering indicate failure. Test element resistance with a multimeter (a healthy bake element typically measures 15–50 ohms). Also check the broil element. If both elements test good, inspect the thermal cutout fuse in the control circuit, as a blown fuse can also produce E305. Replace whichever component is faulty.