Yoreh Deah 113: Bishul Akum…

This recording starts five minutes into a chabura discussing an oven which automatically withdraws the fire or heat source when the door is opened and reignites when the door is closed; if a Yisroel were to be the one to originally turn on the oven (to the point that it heats up to at least 200 F) and the non-Jew opens and then closes the oven is there a problem of bishul akum?