Check the Gas Supply
If the oven is not working, first check the range's gas supply. To ensure that gas is properly flowing to the appliance, attempt to turn on the stovetop burners. If the burners function properly, gas is flowing to the appliance and the problem lies elsewhere in the range.
Test the Oven Control
The electronic oven control is the brain that runs the bake and broil features, which operate independently of each other. First, look for any error codes on the display that could indicate a failure. A failure code will start with the letter "F" and be followed by a number. F0, F1, F5 and F6 indicate a failure with the electronic oven control. If you see no error codes, turn the oven to the "Bake" setting and allow it to heat. Turn off the "Bake" setting and turn on the broiler, allowing it to heat. If neither setting works, the electronic oven control is probably the cuprit and should be replaced. But if one setting works while the other doesn't, examine the nonfunctioning burner and the ignitor.
Examine the Individual Burners and Ignitors
When alternating between the bake and broil ignitor, if one lit while the other failed, you should examine the burner for food residue or damage that may be preventing it from lighting. If food residue is stuck to the a burner, preventing it from lighting, use a toothpick to remove it and test the burner again. If the burners are in good condition, the likely culprit is the ignitor.
Accessing the Burners
Unplug the range and turn off the gas valve. Open the oven door and remove the oven racks. Use a flat-head screwdriver to flip the oven door hinge locks down, then lift the oven door to the broil-stop position and remove it from the oven. Remove the screws securing the bottom panel of the oven and remove it if you're accessing the bake burner; then remove the screws securing the burner shield and the burner shield itself to view the burner. If examining the broil burner, remove the screws securing it to the top of the oven and pull it away from the range to remove it. Examine each burner for warped areas, dents or cracks. If you find damage, replace the burner.
Testing the Ignitor
If the burners are not damaged, test the ignitor. The ignitor is located beside each burner and is secured using a bolt. Remove the bolt and pull the ignitor away from the rear wall of the range. Disconnect the wire harness and remove the ignitor. Set your multimeter to the lowest setting for ohms of resistance. Insert one of the probes into the wire terminal on the ignitor. Insert the other probe into the other terminal on the ignitor. If the meter does not show a reading between 0 and 1,100 ohms of resistance, the ignitor should be replaced.