If you’re sure no power is coming into the range, we need to figure out if the problem is in the house wiring or inside the oven or cooktop. First, of course, check the house breaker or fuse. Next we need to test for power where it enters the oven. This can sometimes present a problem. In most installations, there is a 220 volt wall plug. If this is the case, turn the breaker off or pull the fuse, pull the oven or range away from the wall, pull the plug out of the wall, turn the breaker back on, and test the wall outlet. Also check the terminal block for problems as described below. The terminal block is where the main power cord attaches to the oven circuitry. It will be just inside the back somewhere. (see figure 4-E)
Check all heating elements, on all settings. Check the clock, timers, and the oven light if any. If at least one component is operating properly, you have power. Keep in mind that if one leg of the circuit is out due to a house wiring problem, you might have 110 volts but not 220. This might mean the oven light and clock and even some of the heating elements operate on low power, but the high-heat circuits do not work. It also means you still have power, and you can still get zapped.
In some installations, the electric oven or electric stove is wired directly into the house wiring. If so, the wiring will be connected directly to a terminal block within the unit. You need to follow the steps as described above, but while the power is off, locate the 3-wire terminal block as shown in figure 4-E.
Figure 4-E: Main Power Terminal Block
Inspect the terminal block for any signs of damage; overheating, melted terminals, etc.
Make sure all wiring is clear and make sure you don’t touch any bare wires or terminals, turn the breaker or fuse back on briefly, and check the terminal block for power across all three legs as shown in chapter 2. Then remove power again at the breaker or fuse.
If power is not getting to the terminal block, the problem is in your house wiring. During the 70’s some houses were built with aluminum wiring, which is notorious for not being able to handle oven currents. House wiring repairs are beyond the scope of this manual. There are plenty of good books on house wiring; get one of those, or call an electrician.
If power is getting to the terminal block, the problem is obviously somewhere within the oven. There may be a main fuse, or a main switch that everything is routed through. Find your wiring diagram, isolate the problem and repair as described in Electrical troubleshooting.