I have a problem with my Thermador oven not igniting (Model PGR304).

Here are my symptoms:

When the sector knob is switched to either “bake or conv bake”

1). I hear relays turning on and then a hum sound.
2). I smell gas, but on igniter
3). Can use match to ignite burner

I have replaced the following parts
1). Control board P/N 499488 :mad:

2). Ignition device P/N 41885 :mad:


The rest the stove works fine. Four burner ignite, Grill ignites, Broiler ignites, lights all work. After replacing control board and oven Ignitor the exact same symptoms remained.

Is there something I missing? Is there a way to test the controller board or the Ignition device?