Question about Thermador SC302T Electric Double Oven

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What does F34 mean as an error message? - Thermador SC302T Electric Double Oven

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Mark MacDonald

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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.


example:
What does F34 mean as an error message? - macmarkus_999.jpg

( 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 service...safety 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.


Regards,

Macmarkus :)

Posted on Sep 15, 2011

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Simon Evans

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We have had the F34 error twice in the 13 years we have had the single oven both times we took the oven out of the cabinet and rested it in a table, taken off the back panel and vacuumed and compressed blown the fan and the plenum (about 15 minutes work) and put it back in. It worked fine just gummmed up with dirt and grease and blocked vent. You just need a screwdriver vacuum and possibly a compressor with a blower attachment,
Hope this helps

Posted on Oct 17, 2017

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Hello,

Welcome to FixYa.

The "F34" code on your model of Thermador oven indicates the control has detected an error with the airflow for the oven.

This could indicate a faulty blower motor not coming on at all, or if it does come on ( you should be able to hear it or feel it blowing out the bottom under the door if it's working ) and still initiates an F34 error it is likely the sail switch is sticking. The switch 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. The blower is located at the back wall of the oven plenum as illustrated here.
macmarkus_224.jpg
( F34 can also be initiated by a failed "K4 relay" on the control board, but that is less likely )

The sail switch as I mentioned can be accessed by way of removing the lower grill...i.e. macmarkus_223.jpg **Turn off the 40 amp breaker to the oven before attempting any service...safety first**
If you feel capable this is the procedure for testing the blower and sail switch as follows...At this point I recommend calling in a pro, it's your call.


macmarkus_225.jpg


Let me know if I can assist you further regarding this issue and I`ll try to be available asap.

Good luck.

Thank you for choosing FixYa today, please take a moment to rate the info provided here for you.
Regards,
Macmarkus :)

Jan 08, 2011 | Thermador CM301U Electric Single Oven

3 Answers

F 34


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 https://www.6ya.com/expert/donald_a8261495ff0777e2

Mar 10, 2008 | Thermador C301U Electric Single Oven

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