Bottom Oven Does not work - F64 Code on Panel

i have the same problem and im in oakhurst. the repair person thought it was because the bottom oven does not close fully which i should have had fixed under warranty. they are coming oout on friday

I found out from Thermador customer service that error code F64 means that the lower fan switch (located inside the bottom trim on the right side) is not being detected as closed. In my case, this was because the header (P4) on the Display panel had broken loose from the PC board and was no longer making contact. P4 is where the lower fan switch wires connect to the control boards (actually the display panel).

Good luck!

I had this several times now - ultimately the cause was the air sensor switch which makes sure the cooling fan (not the convection fan) is running.

It turns out this switch is not sealed, is probably being overstressed for temperature, and after a while collects enough grease and dirt in it to stop working.

The upside to not being sealed is that once you remove it, you can take it apart and clean it. This is good, since the website for parts ordering doesn't clarify which of two items listed as "SWITCH" is the one I need, and after 30 minutes on hold calling their parts department, I was disconnected.

Hope this helps....