Try holding knob and try to light for 30 seconds.
After 5 years of trying the oven, I gave up and removed just the oven and put in electric convection oven from target and much more consistent results now
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2014 Stealth Evo 2850- "Woodstock"
2011 Toyota Tundra Rock Crawler TRD 5.7- "Clifford"
2013 Honda Accord Coupe V6 w/Track Pack- "Julia"
Just glad to get away