Unplug the Superba power cord or cut off the electricity at the circuit breaker, whichever is easier for you, depending on the stove installation. If the Superba has been in use, wait for it to cool completely.
Open the Superba door so you can remove the two wire grates inside. The grates slide out and lift from the front at an angle for removal.
Take out the Phillips-head screws that hold the broiler coil to the back wall of the Superba. The screws are mounted through a plate attached permanently to the broiler. The plate provides support.
Unplug the broiler assembly, pulling it straight back from the power sockets.
Dial a multimeter selector knob to test for ohms.
Attach the probe on the end of each multimeter wire to one of the metal terminals on the tip of the broiler.
Press the test button on the multimeter. If there is no digital readout, the display remains at zero or the numbers on the display cycle endlessly, there is no circuit continuity in the broiler, and it must be replaced. If the readout hovers between 20 and 40 ohms, the broiler is functional, and there may be an internal wiring problem in your Superba.