When an older Thermador C-series, CM or CJ oven shows F13, the power board reports that it is not calibrated. The legacy service table adds one extra check beyond the board: whether the air switch is…
When an older Thermador C-series, CM or CJ oven shows F13, the power board reports that it is not calibrated. The legacy service table adds one extra check beyond the board: whether the air switch is jammed. These manuals print codes as F plus two digits for several Thermador generations, so we match F13 to your model number first. Cooking is interrupted until the cause is found.
1. Press OFF or cut the oven's power at the breaker for three minutes. 2. Restore power and see whether the display clears. 3. If F13 comes back, write down the code and call us. Looking at the air switch means opening the control area, so we handle that.
It senses airflow from the cooling fan, so the control knows the electronics are being cooled. If it jams, the control cannot confirm airflow and may refuse to continue.
They both involve air switches in this oven family, but F34 names the upper oven cooling fan switch directly. F13 is a calibration code where the switch is only the first check.
No. It lives behind panels, near wiring. A technician can free or replace it safely and then confirm whether the power board still needs attention.
Our technician checks it in your home and hands you a written price before touching anything.