There is no pilot on most of today's gas ranges. It uses and electric igniter to ignite gas via a gas safety valve. If the surface burners are working but the oven doesn't, this can be a simple matter of a bad igniter, or a bad Electronic Oven Control (EOC) board. The EOC is on the control panel and controls all your oven features. Since the igniter is the more common cause of this problem (and less expensive), I would recommend checking the igniter before assuming you need a new control board.
Have you confirmed whether or not the broiler still works? If the broiler still lights, then your problem is not a gas issue (some ovens use a separate regulator for the surface and oven gas supply). Each manifold in the oven has its own separate igniter.
The following link explains a little theory about how your oven works and what types of igniters are used:
http://www.fixya.com/support/r401858-replacing_oven_igniter_gas_range
It is common for the bake igniter to wear out faster than the broiler because it is used more frequently. NOTE: Just because an igniter glows, does not necessarily mean it is good. An igniter will become weak with age and may not draw enough current to open the gas safety valve. If the safety valve does not open, there is no gas flow, therefore, no ignition.
This is a designed safety feature that prevents free flowing gas from filling up the oven cavity with no ignition. Such a condition could become an explosion hazard.
A replacement igniter (if needed) can be purchased at any of the following websites:
searspartsdirect.com
appliancepartspros.com
pcappliancerepair.com
repairclinic.com
Prices vary between sites, so shop all of them for the best deal.
NOTE: If the connector plug on the replacement igniter you receive does not match the existing igniter, you should be instructed to cut the wires and splice them using ceramic wire lugs that should be included with the kit. Do not use standard wire lugs as they will melt. The ceramic lugs and the wiring to the igniter are heat resistant.
If you have any questions, or require additional assistance, please let me know. I hope this helps you.
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