I reset all controls and a few minutes later the

To turn on the oven on your Defy Thermo Fan gas stove, follow these steps:

1. Make sure that the oven is properly connected to a gas supply and that the gas valve is turned on.
2. Turn the oven control knob to the desired temperature setting.
3. Press the oven ignition button to ignite the gas. You may need to hold the button down for a few seconds until the gas ignites.
4. If the gas does not ignite, check the ignition system and make sure that it is functioning properly. You may need to consult the stove's manual or contact a professional for further assistance.
5. Once the oven is ignited, it should begin heating up to the desired temperature.

Keep in mind that it may take a few minutes for the oven to reach the desired temperature, depending on the setting you have chosen. You can use the oven control knob to adjust the temperature as needed.
If you are having trouble turning on the oven on your Defy Thermo Fan gas stove or if you have any other questions, you may want to consult the stove's manual or contact Defy customer support for further assistance.

Dangerous! Don't relight until you have qualified person inspect it after they actually take it apart to look for the problem.
Sounds like major gas leak or faulty gas valve. Don't take a chance on it. don-ohio

You will need to replace the clock/timer on the unit. Here is that part to order.
Frigidaire 316557114 Clock timer AppliancePartsPros com

Sounds like the capillary tube is out of its holder where the oven starts the lite up with the there's a click click click sound before it lights ignition spark at this point where it clicks there is a tube on the end of a like copper or aluminum solid wire in a snap in holder if its out put it back if its dirty clean it shiney this controls the gas from the oven temperature control just like a thermocouple same thing. This is your problem or someone has adjusted to oven thermostat out of whack. this is all it cam be.I have also provided you with an owner manual for it in the link below. Don't forget to rate my solution and give testimonial this is how i earn my accomplishments Thanks in advance

Yes you will need to change them. The flame will be large and eratic if not changed.

Probably the control relay has shorted. But first check the voltages at your receptacle to insure that a neutral is not floating. You should fine 120 from each hot to the neutral.

You just need to turn the knob a bit more, thats the igniter you are hearing.

You have a fault in the range electrical system

FRIGIDAIRE
Range/Stove/Oven Fault Codes Version 3 Failure
Code Condition Check/Repair F0 & F1 EOC (Electronic Oven Control) failure Replace EOC (Electronic Oven Control)

So, you cleaned the burner per the manual (or the one you looked at when visiting the appliance store,) and it still flames out right after coming on? Sometimes things catch in the works and there are a few methods to clear them out (e.g. at the controls) depending on the model. Beyond that,in order to disconnect the stove and check the inlet filters, you might want to call the appliance or gas co for a technician. No use having leaks, searching forever for the main shutoff valve, etc.