Hi Actually was not looking for it but found a complant filed with a governmental agency.http://www.saferproducts.gov/ViewIncident/1195027
Please read

I have had my Wolf AG for a little over a year. It makes a really loud Whoosh sound when it first starts up, but not so much after that. Is the first start up usually really loud?

You are doing the right thing to have it looked at. I had a similar thing with another oven once and I think it was an ignitor(or glow plug) that was bad, easily replaced---but that might have nothing to do with what is wrong with yours!

I recently repaired a similar problem in a viking range [gas] about the same age. The burners were deteriorated near the ignitor. T'was a simple fix to replace the burners.

Good luck.

Range was repaired today. It needed a new burner and ignitor and a pipe replaced. DH handled the repairman so I am not sure what the "pipe" was, but all is now well. Not too bad: two visits (diagnosing, then fixing), $335.