Brand new stove burners won't light
My KitchenAid (just took it apart for cleaning, so this is fresh in my mind) looks nearly identical (except the oval burner - but instead it has a 2-section round burner) with the empty section underneath, metal part with teeth on top and burner cap on top. Without everything in place you get sparks &amp; gas but not ignition. When I got my current cooktop it was a Sears outlet special (incredible deal) but turned out to be missing one of the caps (they grabbed the parts off another, so no problem) so those caps may be missing or sitting in a box somewhere. They look something like this:



On a mid-to-high end cooktop, you will typically find that each burner will be a slightly different size (physical dimensions and BTU), so you have to make sure the caps are correct - if they are not correct then they will not stay on very well and the burner will either not light at all or not burn correctly.