Thermador Oven will not heat

[FONT=Arial]Hi,
I have a Thermador PRG304EH oven where the Oven does not heat. The heating element glows Red, the Broiler works and the Range top also works. It appears the gas for the oven never turns on. It also has occurred to me that in the rare instance that it did turn on after using the range the cooling fan(s) would turn off immediately when I turned the oven off, which I don’t recall historically, as they would run for about 15 minutes after turning the oven off. The oven was intermittent at turning on, however it no longer comes on at all, only the heating elements glows red. Suggestions to check and possible values / readings to measure?
Thanks in advance.
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