have an old commercial stove/oven/griddle combo, purchased second hand. everything works, but when I lit the oven pilot I was able light the oven, everything looked operational for a few minutes. After shutting the gas off I had to relight everything and again the pilot lit, then the oven. I set the oven for 400 and put an oven thermometer on the rack. The burner turned off and I am unable to get it to relight. Pilot is still on but looks very small. I can push the red button on the gas valve in and the pilot is normal momentarily. No joy on lighting the burner again.
any thoughts are appreciated in advance
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