Wolf M Series Code 1731: Upper Oven Light Triac Open

What 1731 means

Across the Wolf M Series wall oven range, from the SO30TM and DO30PM to the SO3050 models, code 1731 means the triac for the upper oven light is open. The control cannot switch that light on through the output it uses. You will see 1731 on the display, and the upper oven lamp stays dark even when you press the light pad.

Common causes of 1731

Open triac for the upper oven light
Connection between the board and the upper oven light output loose
Control board output stage failed

✓ 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 1731 reappears. 4. A repeat of 1731 means it is time for a technician, and we ask that you leave the back and controls closed.

! Why to stop there

An open triac can be the output, a connector or the board, and each needs its own test.
A guess at the failed part often means paying twice, so we diagnose first.
The written estimate arrives before the work does.

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

17311731 questions

What does 1731 mean?

The triac for the upper oven light is open, so the control cannot switch that lamp on. 1731 guides our first tests, so the quote reflects the real cause.

Is 1731 urgent?

Usually not. The oven can still cook, and you can rely on the timer and display. Have it checked at a convenient time. We check 1731 on your own unit first, so there are no surprises on the bill.

Is it only a bulb with 1731?

A burned-out bulb is worth ruling out, and we do that first. If the lamp is good, the open output is the cause and we quote the repair in writing.