Avanti 20" Range ER20P0WG. Oven will not turn off.

SOURCE: Frigidaire electric range

is there voltage going to the erc (electronic range control)?

SOURCE: Kenmore range

If this range has electric elements in the oven, you may have blown one of the heating elements. Do any of the oven functions work? If you were attempting to BAKE when this occurred, have you attempted to turn on the BROILER to see if it works? If the BROILER still heats up, you may just have a bad heating element. If both features quit working, the problem may be with your Electronic Range Control (ERC) board. Post back with comments and let me know.

SOURCE: Calibration

Electric ovens are calibrated behind the temp knob. Pull the knob straight off of the shaft and look at the back of the knob. There should be a metal slide with a scale and a little set screw. Loosen the screw and move the slide in the direction indicated for your needs.

SOURCE: Frigidaire Electric Range error code

Hi jacksmdmat,
Your f30 problem may be a bad sensor circuit. It may have an open connection or just plain defective sensor. Check the connection between the clock and the sensor as well as disconnect and measure the resistance of the sensor - should be about 1090ohms at room temp (75F)

SOURCE: How to clean lower oven of 30" electric range by electrolux

try a lemon heated and the acid will eat away the food