Why is my Beko Bbim12300x oven not heating up?

The oven may not be set to a specific cooking function and/or temperature — set both using the function selection knob and temperature knob. For models with a timer, the time of day may not have been set, which must be done before cooking. Also check that the mains is operational and that the fuses in the fuse box are not blown. (Page 35-36)