Question about Thermador SC302T Electric Double Oven

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Thermador double oven SC302 Fault code F34

I replaced the board last year. This holiday season, the fault code came back. Is this oven not to be used for cooking?

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  • hb3st Jan 19, 2008

    Panel went dim.  Ordered a new one, which arrived.

    Plugged in as directed but ovens are now dead.
    There was a second board. Does it go in too?



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First check to see if the oven is under warranty it might also be a manufacturers defect

Posted on Dec 30, 2007


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1 Answer

CM302US Thermador Double Oven F34/64 Problems need schematic diagrams

air flow/fan issue. either bad fan motor, air flow switch or relay board.

Nov 29, 2012 | Thermador C302U Electric Double Oven

2 Answers

What does F34 mean as an error message?

Hello, welcome to FixYa.

The "F34" code on your model of Thermador double oven indicates the control has detected an error with the airflow for the upper oven ( all lower codes start with "6", upper start with "3" )

This could indicate a faulty blower motor, not coming on at all, or if it does come on and still initiates an F34 error, it is likely the sail switch is sticking. It can be removed and cleaned as they do become contaminated with dirt, grease and dust over time.

The sail switch is located at the very bottom of the ovens where the grill is, under the lower door.


( F34 can also be initiated by a failed "K6" relay on the control board, but that is less likely )

It can be accessed by way of removing the grill, however it is something usually best left to an authorized B/S/H/ service provider as it can be quiet involved and is better to pull the unit from the wall.

**Turn off the 40 amp breaker to the oven before attempting any first**

B/S/H/ is the parent company for Bosch, Thermador, Gaggenau, Siemens.

Thank you for choosing FixYa today and good luck, please take a moment to rate the info provided here for you.


Macmarkus :)

Sep 15, 2011 | Thermador SC302T Electric Double Oven

4 Answers

Thermador SC302 double oven the top oven is not getting hot

We've had the same problem. I contacted a local sales room and they contacted their rep who promptly mailed the replacement parts I requested (I'd looked up the part numbers already). Now I'm waiting to find someone who will reasonably do the work.

Aug 10, 2009 | Thermador SMW272 Electric Double Oven

1 Answer

Thermador oven sc302 no heat

On modern electronic control ranges, the oven temperature sensor
is the part that regulates the oven temperature. If it is not working properly it could be the reason why the range or oven won't start. This part can be found inside the oven on the rear wall near the top. Most modern ovens will display a fault code if the oven sensor is at fault. If you think the sensor may be the issue you can check the resistance with a multi-meter but will need to know the correct resistance of the sensor at room temperature. Remove power from the appliance before performing this test.
1.Aclicking sound could be something wrong with a relay. Check for any loose connections around the main control board on your oven. The click you hear is a relay losing power and switching back on. If the clock resets then something is causing power interruptions to the board.
3.Even a bad relay door switch will hinder your oven from operating.

If your oven has internal fuses, a wiring or component problem could have caused a fuse to blow. A blown fuse is an indication that a component has shorted or failed, and the problem will need to be corrected. Most ovens that use fuses will have an indication of the circuits that are affected by a particular fuse. If an oven fuse has blown, then you should inspect the oven element and the associated wiring to determine the cause before replacing the fuse.

Mar 05, 2009 | Thermador C302U Electric Double Oven

1 Answer

Oven shuts off?

F34 is a cooling motor fault. May sure that the cooling motor is running.If not, then check that there is 120 volts to the motor.The motor sensor on this oven is attached to the cooling fan. It could be a simple issue of loose wire in the connector. Find the wiring going to the relay unit from the motor, pull the connector and hold a flash light on the back side of the connector. You should see almost no light. If you see mostly light, there is your loose connection.

Jan 06, 2008 | Thermador SEC301BPSS Electric Single Oven

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