Wolf M Series Code 0920: Triac Shorted on the Upper Right Convection Fan

What 0920 means

Across the Wolf M Series wall oven range, from the SO30TM and DO30PM to the SO3050 models, code 0920 says the triac driving the upper right convection fan is shorted. It is the alternate number for 0931. A triac is the electronic switch for the fan motor, and a short means it cannot turn off properly. Owners may hear the fan running when the oven is idle, or find that heat control suffers.

Common causes of 0920

Shorted triac on the upper right convection fan
Control board output stage damaged by the short
Voltage spike in the supply line

✓ One safe check you can try

1. Shut the oven off and leave it alone until the cavity has cooled. 2. Cycle the dedicated breaker, leaving it off for a full minute. 3. A short trial run will tell you whether 0920 was a one-time event. 4. Once 0920 returns, stop and call. Opening the oven or the control is not safe.

! Why to stop there

The triac sits on the control board output, so it is not a part you can swap off a shelf.
A fan that cannot be controlled can strain its motor and throw off cooling and heat balance.
A price in writing comes 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.

→Same appliance

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 2420Wolf M Series Code 2420: Relay board RTD circuit 3C20Wolf M Series Code 3C20: High input voltage 2631Wolf M Series Code 2631: Relay board door switch circuit

09200920 questions

What is 0920 on my oven?

The triac that drives the upper right convection fan is shorted. The same problem also appears as 0931 on some ovens, so you may meet either number.

Does 0920 matter if the oven still heats?

Yes. The upper right convection fan may run without control, which can wear the motor and disturb airflow and cooling. We recommend a check soon.

Will the breaker clear 0920?

You can try one reset. A real short returns, and then we test it, quote in writing and repair only once you approve. Reading 0920 on the display gives us a starting point, and you decide after seeing the price.