Oven wouldn't light

My analysis was flawed. The $100 gas valve was acting erraticaly, so I replaced it. On a hunch, I took the top front off the stove and immediately saw a row of mini relays mounted on the $300 control board. The one labeled "bake" was black!
It is just too small for years of gas on / gas off high current. (The gas valve is indestructable. I took the old one apart. It's only a heater wire wrapped around a bimetalllic arm that lifts a soft pad off of the valve orfice.)
I removed the control board and desoldered the "bake" relay and the "light" relay. I cleaned up the bad "bake" relay contacts and swapped the two relays. Works fine. Better $100 mistake than a $300 control board. (Could have been $0, though.)