Wolf M Series Code 0620: Auxiliary DLB Shorted, Alternate for 0630

What 0620 means

On M Series Wolf ovens (the SO30TM and DO30PM families and the 2019 and later SO3050 line), code 0620 reports an auxiliary DLB that is shorted. It is the alternate number for 0630, so some ovens show one and some the other. The control finds the line-break path for the auxiliary circuit closed when it should be able to open it. You will see 0620 and the oven may restrict that function.

Common causes of 0620

Shorted auxiliary DLB path
Control board relay for the auxiliary circuit stuck or damaged
Wiring or terminal damage near the auxiliary circuit

✓ One safe check you can try

1. Cancel any cooking, and wait until the cavity is comfortable to be near. 2. Reset power at the breaker: off for a minute, then on. 3. If you want to test, start a short cycle and note whether 0620 reappears. 4. A repeat of 0620 means it is time for a technician, and we ask that you leave the back and controls closed.

! Why to stop there

A shorted DLB is a line-break switching problem on a high-current circuit, which owners cannot test safely.
Even on the auxiliary circuit the same caution applies: a path that will not open should not be left in use.
Workmanship is covered for 30 days after the repair.

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

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 0121Wolf M Series Oven Code 0121: upper right convection relay shorted 0221Wolf M Series Code 0221: Upper Bake Element DLB Shorted 1321Wolf M Series Code 1321: Upper broil element relay open 3031Wolf M Series Code 3031: Upper temperature probe shorted 1421Wolf M Series Code 1421: Upper left convection element relay open

06200620 questions

What does 0620 mean on my Wolf oven?

It means the auxiliary DLB is shorted. The oven also knows this problem as 0630, so you may see either number depending on the model.

Can I keep baking while 0620 shows?

We advise against it. With a shorted line-break path the control may not be able to cut power reliably, so have the oven checked first.

Will a breaker reset clear 0620?

Only a one-time glitch clears. If it returns on the next cycle, a technician has to test the circuit, and you approve a written price before repair.