What is error code F34 on the thermadore built in double oven

coolingfan/air flow issue on the upper oven

bad solder joint on the relay board where the wires from the fan plug into it.

bad solder joint at relay board where the fan wires connect.

fan/air flow issue.

fan/air flow issue.

upper oven fan airflow switch not activated. It may be stuck or the fan isn't running at all.

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

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:


( 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 :)

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

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