Wolf Legacy E Series Code Error 07 x 21: cooling fan triac open

What Error 07 x 21 means

Error 07 x 21 on a Wolf Legacy E Series wall oven, for example the DO30TE/S/TH and SO30CE/B/TH, reports an open cooling fan triac. Here x stands for whichever oven cavity is involved. The control commanded that output and the circuit did not complete, so the part it drives may stay off. You will see the code on the display, sometimes along with a refusal to start the mode that needs this part.

Common causes of Error 07 x 21

The cooling fan triac output on the control board not switching as commanded
Wiring or a plug in the fan motor circuit that has worked loose or been damaged
The fan motor itself no longer completing the circuit

✓ One safe check you can try

1. Cancel the cycle and give the oven 30 minutes to cool. 2. Check that the door shuts squarely and the racks sit flat. 3. Turn the breaker off for a full minute, then restore power. 4. Run a brief test bake and watch for Error 07 x 21. 5. If the code returns, leave the oven off and book a visit. Panels and wiring are for a technician only.

! Why to stop there

Swapping parts to chase a cooling fan triac reading gets expensive quickly, and we test first.
Because Error 07 x 21 can return after a power cycle, a reset only postpones the diagnosis.
You get a written price before we touch anything, and our work is covered for 30 days.

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 Wall Oven codes

0121Wolf M Series Oven Code 0121: upper right convection relay shorted 0221Wolf M Series Code 0221: Upper Bake Element DLB Shorted 0321Wolf M Series Oven Code 0321: Broil Relay Shorted on the Upper Element 0421Wolf M Series Code 0421: upper left convection relay shorted 0630Wolf M Series Oven Code 0630: Auxiliary DLB Shorted 2720Wolf M Series Code 2720: Element or door lock watchdog failure 4031Wolf M Series Code 4031: Upper bake element not detected 2820Wolf M Series Code 2820: Relay board door lock relay circuit

Error 07 x 21Error 07 x 21 questions

Why is my Wolf oven showing Error 07 x 21?

The control tested the cooling fan triac and found it open. That is a circuit reading, so the oven is telling you where to look. The x tells you which cavity reported it, which helps us start in the right place.

Is it safe to bake while Error 07 x 21 is on the display?

The oven may let you, but the control no longer trusts the cooling fan triac. We suggest holding off until a technician has checked it, since a circuit that reads wrong can behave unpredictably.

How do I get rid of Error 07 x 21?

Let the oven cool and cycle the breaker once. If the code comes back, the cooling fan triac needs testing by a technician. That is the only reliable way to clear it for good.