My gas oven makes a noise

If it's a gas oven and has an electric element starter (glows orange to ignite the gas), the element can be taking a long time to heat up, which means the oven doesn't light for a while and so seems to lake a long time warming up. If you turn it on and then look at the area where the flame should be (broiler) and the flame takes a long time this could be the problem. This happened to me and replacing the element fixed it. Now the flames light within 30 second or so.

Normally not the thermostat. Blue flames signify that the gas is burning clean, a yellow flame signify that some contaminate is burning with the gas. I would guess that something has leaked onto the burner or you have some corrosion build up. Try taking it out and giving it a good cleaning with a soft bristled brush and see if that is any better.

Sorry to read about your problem, I hope this helps you out.

Bad gas control valve or oven temp control

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This sounds a lot like a defective pressure regulator. If you do not have one externally connected, then the internal regulator is faulty. If internal, it shouldn't be too difficult to DIY. Just make sure the pressure rating is the same as the one that has failed.

If this oven has a "stack" (where the hot gases & heat vent to your hood) air could be blowing down the stack affecting the pilot. Simple test, Bic lighter lit at the top of the stack in the middle of the opening. If the flame is being sucked down the stack, then you have air blowing the pilot out. How old is the thermocouple on this unit ? Pilot flame heats this up to send a signal to your main gas valve to open up so the burners light. A weak t-couple could be your problem. Hope this helps

its probably your thermocouple an older one you'll see the pilot light/on newer models after it fires theres a flame sensor eye to distinguish that theres a flame and to continue to supply gas,if no flame is detected the gas valve is shut off for safety,the flame sensor eye could be defective or dirty also

You have a gas leak.
Call a qualified technician quickly.

This sounds like you have a flame switch getting ready to go out. The reason you are hearing the ticking noise is that after the ignition is satisfied the flame switch is not detecting and sending a signal to continue to try for ignition.

too much air on top burner ,delayed ignition on oven ,ignitor not lined up properly or check gas presure may need regulator adjustment or replaced. gas 784