Our KitchenAid gas oven doesn't heat up. This model (KGSI901PBS00) seems to use a spark-based igniter (rather than a glowing element). Anyway, you can hear load clicking noises, but the burners don't come on. I removed the oven burner covers and heat shields and turned on the bake function. I left it on for a few seconds. I could clearly smell gas, but the burner did not come on. The only thing unusual is that the clicking noise for the ignition system is louder now (even before disassembly). The upper stove burners work fine.

Your help will be much appreciated.