Wolf M Series Wall Oven Code 4731: Upper oven lights not detected

What 4731 means

On Wolf M Series wall ovens, including the SO30TM/S/TH and DO30PM/S/PH, code 4731 tells you the control does not detect the upper oven lights. It switches the lamps on and sees no load, as if the bulbs or their connections were missing. The display shows 4731, and the oven is usually still able to cook, but the interior may stay dark.

Common causes of 4731

Burned-out oven light lamp
Loose or corroded lamp socket or connector
Relay board output for the upper oven lights

✓ One safe check you can try

1. Press the Off key and allow the oven to cool to a safe temperature. 2. Look into the upper cavity and note whether any light comes on when you press the light key. 3. If your manual describes a lamp lens you can turn by hand, do that only when cold and with the breaker off. 4. If the code stays, call us.

! Why to stop there

The light circuit shares the relay board with heating loads, so we confirm it is only a lamp.
Replacing a lamp is simple for us but we also check the socket for heat damage.
Our quote is written, agreed, and only then acted on, with 30 days of workmanship 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.

→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 1A31Wolf M Series Code 1A31: Upper left convection fan triac open 3421Wolf M Series Code 3421: Upper door lock timeout 1B21Wolf M Series Code 1B21: Cooling fan triac shorted (1B21)

47314731 questions

Can I keep cooking with 4731 showing?

Usually yes. The lights are not part of heating, so baking should continue. We still suggest using a flashlight to check food and getting the lamps looked at soon.

Is it just a burned-out bulb?

Often it is, since the control reports no load when a lamp has failed. But a bad socket or the relay board output can cause the same code, so we test before assuming.

Why is a lamp code on a high-end oven?

The control monitors every load, including lights, so it can tell when one is missing. That is useful information, and it makes the cause easy to find.