Wolf L Series Code RTD OPEN: oven sensor circuit open

What RTD OPEN means

On Wolf L Series legacy wall ovens with the Invensys control, such as the SO30F/S and DO30F/S, RTD OPEN means an open circuit was detected on the RTD oven sensor. The control cannot read the cavity temperature, so it stops heating and shows the message. The prescribed repair is to replace the RTD sensor, once the reading is confirmed. It does not clear until the sensor reading is valid again.

Common causes of RTD OPEN

RTD sensor open circuit
Broken sensor lead or connection
Sensor failed after heat cycling

✓ One safe check you can try

1. Let the oven cool fully. 2. Switch the breaker off for one minute and restore power. 3. Look inside the cavity for the thin sensor rod, without bending it. 4. If RTD OPEN returns, stop and call us; do not tug on the sensor.

! Why to stop there

The sensor reading must be measured with a meter to confirm it.
Bending or pulling the rod can make things worse.
We quote in writing first and cover repairs 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.

→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 1831Wolf M Series Code 1831: Upper door lock relay open 3311Wolf M Series Code 3311: Upper thermal cutoff open 1A31Wolf M Series Code 1A31: Upper left convection fan triac open

RTD OPENRTD OPEN questions

What is an RTD?

It is the resistance temperature sensor that tells the oven how hot the cavity is. RTD OPEN means the circuit to it is broken, so the control has no temperature to work with.

Can I bend the sensor back into place?

Please do not. The rod is delicate and its position matters. If it looks shifted, still call us, since a reading test is needed. A small shift in position can also affect baking results later.

Will the oven heat without it?

No. The control stops heating when it cannot read the sensor, which protects the oven. A replacement sensor restores normal operation. Expect a short visit, a written price first, and a 30-day workmanship warranty on the new sensor.