Re: gas furnace burner lites
After the low flame is on for a little while try taping the valve (lightly) with a small hammer or screwdriver handle, it;s possible one pf the valves is sticking, I've had that happen after the furnace sat all summer. The other thing to try , turn the power off to the furnace, and unplug and plug the spade connectors several times each. This will clean the connections if there is one that is corroded a little.
Be sure you live your life, because you are a long time dead.-Scottish Proverb