Element Supervisor Disabled: Thermador Wall Oven F5, SC/SM-Series Legacy

What F5 means

On older Thermador SC, SCD, SM and SMW ovens, F5 means the element supervisor is disabled in a single or upper oven. The source notes a possible wiring mix-up: on single ovens, including the SM and SMW, the display head harness should sit on J2 but may be plugged into J7. A technician can compare pin connections to the harness plug. If a new sensor still shows F5, the main board is next.

Usual causes of F5

Intermittent oven sensor
Main power/relay board
Possible mis-wire: display head connector on J7 instead of J2

✓ A safe check worth trying

1. Use OFF or the breaker to cut power. 2. Wait 3 minutes, then restore power. 3. If F5 comes back, record it with your model number. 4. Leave harness plugs alone, since swapping connectors can damage the board. Call us.

! Why you should stop here

Moving J2 and J7 connectors by hand can harm the board
The sensor and board must be separated by testing
The source suggests a new sensor may not clear F5 on its own

Taking off a panel yourself does not by default void a manufacturer warranty, yet it can lead to accidental damage, and some manufacturers attach their own service terms. Read your warranty paperwork, or ask us, before you decide.

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More Oven codes

F21Legacy Thermador CM/CJ Lower Oven Showing F21: Lower CANCEL Key Shorted High F60Legacy Thermador Wall Oven, C/CM Series, Shows F60: Lower Oven Sensor Shorted F8Reading F8 on Older Thermador SC and SM Wall Ovens (Shorted Meat Probe Circuit) F22Thermador C/CM/CJ Wall Oven F22 Upper CANCEL Key Shorted Low F61Reading F61 on Older Thermador C/CM Wall Ovens (Lower Oven Sensor Open) F9Thermador Wall Oven F9 on Legacy SC, SCD and SM/SMW Ovens: Invalid Door Lock Switch Status F23Lower CANCEL Key Shorted Low: Thermador Older C-Series Oven F23 F62Thermador Wall Oven F62 on Legacy C/CM-Series Ovens: Lower Oven Overheat During Cleaning

F5F5 questions

What are J2 and J7?

They are connector positions on the main board. The display head harness belongs on J2, and the source says it may have been plugged into J7 by mistake.

Is the sensor the main suspect?

It is one of them. If a new sensor still leaves F5 on the display, the source says the main power/relay board is the next part to check.

Why does F5 mention single or upper oven?

In a double oven the lower oven has its own code, shown as Fr. F5 relates to the single or upper cavity. Houston owners of legacy ovens can book a visit at any time.