The 5 most common part(s) or condition(s) which cause the symptom Oven won't turn on are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1465763
If the oven won't turn on, check the bake element. The bake element is a black tube near the bottom of the oven about as thick as a pencil. When it is operating normally, the bake element will glow red hot. If the oven won't turn on the bake element may have burned out. It is often obvious to see where the bake element has shorted out because there will be a hole or break in the element. If the bake element has burnt out or shorted it should be replaced.
RepairClinic Item # 2210850
If the oven won't turn on, check the broil element. The broil element is a black tube near the top of the oven about as thick as a pencil. When it is operating normally, the broil element will glow red hot. If the oven won't turn on the broil element may have burned out and caused something else to short out. It is often obvious to see where the broil element has burned out because there will be a hole in the element or blisters on the outside of the element. Test the broil element using an Ohm meter. If it has continuity it's OK. If not, it should be replaced.
Although not as common, if the oven won't turn on it is possible that the appliance is not receiving proper voltage. Electric ovens require 220 volts of alternating current. If for some reason the appliance is receiving significantly less, the oven won't turn on. Check for proper voltage using a volt meter at the socket where the appliance plugs in.
RepairClinic Item # 1036364
The oven control board has a set of relays that turn on and off power to the bake and broil circuits according to the customer settings and sensor input. If the oven won't turn on the problem is usually with the heating components. However, if the oven control board is bad, it might not send voltage to the heating components. To determine why the oven won't turn on, first test the simpler components in the circuit. If no power is present at the proper terminals on the control board, the control board will need to be replaced.
If the oven won't turn on, there might be a burnt wire supplying power to the bake element. Sometimes the wire supplying power to the element burns out right near the element itself. Check for this by just looking at the wires leading to the element. If they're burned out it is usually easy to spot.