Whirlpool oven does not reignite after reaching desired temp. I can hear the igniter firing and hear gas flowing but after 4 clicks the oven stops. if i hear the oven attempting to ignite and open oven door, the oven ignigtes. I already replaced the igniter thinking that was the issue. The oven has no issue starting when cold. Is this an airflow issue? if so, how i ensure the oven is getting more air. Oven is 10 years old. Does something need to be cleaned out? also - i noticed that the oven is not sitting level on the floor. Could this also impact its ability to reignite?