Brand new Thermador LP gas range

Hi, I have a brand new Themarmador LP Gas Range. The problem i have is if you are on bake or convection bake the igniter lights the oven it runs for 40 seconds makes a click which i assume is something shutting the gas off and it goes out! 20 seconds later relights and continues this cycle.It takes 30 minutes to get to 400! Now if you put on broil which it has two infared broilers it works fine or if you put it on clean it works fine pegs the temp gauge to clean in 5 minutes or less! Any help will be deeply appreciated!

Do not attempt any repairs. Call Thermador for the warranty service.

Gene.