There are no specific qualifications needed to repair a gas oven. There are a number of websites providing troubleshooting tips and instructions related to gas oven repair for the homeowner, including The Appliance Help Online website that offers numerous do-it-yourself videos for repairing gas ovens.
The Family Handyman offers do-it-yourself instructions on performing typical gas oven repairs, including a list of required tools. HowStuffWorks also provides diagrams, disassembly instructions, safety precautions and step-by-step instructions for replacing door gaskets, cleaning burners, repairing oven setting controls and replacing timers. Pilot lights, shutoff valves and ignition systems are also discussed, and diagrams are provided.