Wolf CSO Steam Oven Code E45 / F8: actuator relay K3 will not release

What E45 / F8 means

On Wolf CSO convection steam ovens, including the CSO30 series, E45 with F8 means actuator relay K3 is stuck. The official causes also list the element or relay board as damaged. The oven shows the pair and stops, because a relay that will not release can leave a heating or steam load switched on.

Common causes of E45 / F8

Actuator relay K3 stuck
Element or relay board damaged

✓ One safe check you can try

1. Cut power at the oven's breaker. 2. Leave it off for a few minutes, then restore power. 3. If E45 / F8 clears, run a short test. 4. If it comes back, stop using the oven and call us. Do not remove any panels.

! Why to stop there

A stuck relay can keep a load powered, so it needs proper testing.
We check the element and the board to see which one is damaged.
You get a written quote first, and our repair has a 30-day warranty.

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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E45 / F8E45 / F8 questions

How does E45 differ from E46?

Both pair with F8 and name a stuck actuator relay. E45 is relay K3 and E46 is relay K4.

Can the element be the cause?

The listing names the element or the relay board as damaged. We test both so you do not replace the wrong one.

Is it urgent?

We treat it as such. Keep the oven off until a technician has checked the relay.