Hi stallters
The first thing I would check is the position of the safety valve sensing bulb. It suppose to be in the pilot flame at the time when the flame extended in response or oven thermostat. The gas to the burner should open after the sensing bulb heats up. Normally it takes 60 to 90 seconds.
If there is nothing wrong with the sensing bulb position then the safety valve has to be replaced.
- The part number for the safety valve
AP2022751
The safety valve
The best price for the part is $92.53
Good luck.
Gene.