If one of your electric burners isn’t heating, it could be a bad burner, a bad connection in the burner socket or a faulty switch.
To see if the problem is the burner, exchange the burner with one that you know works (Photo 1). If that burner won’t heat, the problem is either the burner socket or the infinite switch. (The burner prongs plug into the burner socket.) Connections in the burner socket can burn out and fail to provide power. If the prongs look burned, inspect the socket. If the socket looks charred or burned, replace it. Photo 2 shows how to replace a burner socket.
CAUTION: Always unplug your electric range before working on it.
The knob you turn to control the burner temperature slides over the shaft of the infinite switch. If the switch burns out, your burner won't get power. Test the infinite switch if you know the burner and burner socket are good but the burner still won't heat. We removed the back panel to access the infinite switch. Your range may be different. With the range unplugged, test the switch with a multimeter set to RX-1 (Photo 3). If the meter reading remains the same, the infinite switch is bad and should be replaced (Photos 3 and 4).