Question about Thermador C301U Electric Single Oven

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Oven turns off

F 34

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  • F-34 Feb 27, 2008

    During the pre heat cycle oven shuts off and shows code F34. How is this problem corrected?

  • Anonymous Mar 10, 2008



  • winmarsh Jul 29, 2008

    Every time I try to clean my Thermador double ovens, the oven turns off and I get F33 or F34 codes. If I turn off the main breaker to the ovens and leave it off for a while, it seems to reset the ovens. Then the self clean mode works.

    Now the temperatures are off. Somedays, setting the ovens for 350 F will give me 350, other days, I get 200 or 275 or 325. Both ovens do this .. neither is consistant. Aargh!!!!



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During the pre heat cykle ovens shuts off and shows code F 34

Posted on Oct 24, 2010

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Call Thermador service center 800 735 4328
they said that if you have had an electrical outage or surge recently-
turn off dedicated circuit at circuit breaker for 1 HOUR

Posted on Mar 10, 2008


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My Name is Don from Mr Fix it Applaince in baytown texas. I have seen this F34 error as well and may have a solution for some of you... According to a Thermador error code book for a C301bs/03 single Thermador oven. It says its a air flow problem. This means it could be the fan motor sensor telling the controlboard that it is not spinning fast or not at all. or it could be a micro paddle switch that is activated by air flow, I found Two of them on the bottome of a double oven thermador a few moths ago.. Recap : if your fan blower motor has 4 wires going to it, it has a sensor reading the rotation of the motor.... if yours does not have this then you should look for a paddle switch.

I’m happy to assist further over the phone at

Mar 10, 2008 | Thermador C301U Electric Single Oven

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