Wolf CSO Steam Oven Code E18 / F1: probe wire open or loose

What E18 / F1 means

On Wolf CSO convection steam ovens such as the CSO24 and CSO30 series, E18 with F1 means a break or loose contact in the food probe or its socket. The official causes name broken probe wiring and a probe reading with too high a resistance, meaning a temperature below about minus 20 degrees Celsius. The oven cannot read the probe and shows both codes.

Common causes of E18 / F1

Break or loose contact in the food probe or probe socket
Probe wiring broken or making loose contact
Probe reading at a resistance equal to a temperature below about minus 20 degrees Celsius

✓ One safe check you can try

1. Remove the probe and look for a bent plug or kinked cable. 2. Push the probe into its socket until it seats firmly. 3. Insert the tip into the center of the food. 4. Restart the program. 5. If E18 / F1 repeats, cook by time and book service.

! Why to stop there

A broken wire inside the probe cable cannot be seen from outside.
Socket contact problems need testing inside the oven wall.
We tell you which part failed and give a written price first.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Steam Oven codes

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E18 / F1E18 / F1 questions

What does F1 add to E18?

F1 is the companion number shown with E18. The listing treats the pair as one open-circuit message from the food probe.

Can a loose plug trigger E18 / F1?

Yes. Loose contact is one of the listed causes, so reseating the plug fully is a fair first try.

Can I still cook without the probe?

Yes, timed programs work without it. Have the probe or socket checked if you rely on probe cooking, and our work comes with a 30-day warranty.