Oven not working but broiler was working fine.

Checked lower oven burner for a problem. Oven Ignitor looked like it was glowing and working properly but the gas valve would not open to let the gas flow to burner. I had read on a forum that just because the oven ignitor looks good does not mean it is creating the proper resistance to open the gas valve. So I took my chances and replaced the ignitor (because it was cheaper than the gas valve) and now the oven works like new.