I have an older Thermador RDF30QW (about 20 years old). It is the one with the serial number > that special number always asked for. The oven was taking forever to heat up a few days ago (got to 250 in about 1.5 hours). I took the baking element out and it checked out fine continuity-wise. The broiler also does work fine.
When I do turn it on bake mode, I hear a relay click inside the control module, and then a second later I hear another one. Seems like it turns on and then turns off. I guess the next step will be to check the temp sensor inside the oven and see if it is working. But, it seemed to display the right temperature on the panel when it was getting a bit hotter in there.
I was trying to find the wiring/circuit diagrams for this thing, but it seems like most of the sites out there don't have that info. Lots of info about parts, but not the right schematics.
Anybody have any other suggestions or diagrams out there? I'm really hoping it's not the control module, as those things are not made any more. Guess I could take it out and send it somewhere...