Oven Diagnostics

Wolf Oven
Error Codes

Meanings, severity levels, safe checks you can perform, and when to call a technician.

Enter the code shown on your oven display

Is it safe to keep using it?

Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.

Can error codes be reset?

Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.

When should I stop using it?

Stop immediately for water leak codes, burning smell, or any High severity error.

Most Common Codes

F1 0021 0422 0821 0822 1021 1121 1122 1D21 2720

All Codes

1D21 0021 0422 0821 0822 1021 1121 1122 2720 5121 5220 F1

Error Code Directory

Click any code for detailed troubleshooting steps

Low Medium High

Code Meaning Severity Common Symptom

1D21 Upper Broil DLBs Open High Starting a broil cycle results in a cold cavity — the broil element never glows red because neither of its redundant supply paths is working. View 0021 Bake Relay Shorted High After Cancel is pressed or a cook cycle completes, the bake element visibly stays red because the relay contacts have not released. View 0422 Lower Left Conv Relay Short High On double-oven M Series models, the lower cavity convection element continues to glow after the cook cycle has been stopped. View 0821 Upper MDL Relay Short High The MDL relay switches auxiliary loads including the cooling fan, and a welded MDL leaves the fan running whenever the breaker is on — even with the oven powered off. View 0822 Lower MDL Relay Short High The lower cooling fan stays on whenever the oven breaker is energized, even with the oven powered off at the control panel. View 1021 Upper Bake Relay Open Medium A bake cycle starts on the display but the cavity stays cold because the bake element never receives power through the failed relay. View 1121 Upper Right Conv Relay Open Medium With one of the convection elements not firing, airflow-baked food shows browning patterns uneven across the cavity — typically darker on one side than the other. View 1122 Lower Right Conv Relay Open Medium With one convection element not firing on the lower cavity, baked goods brown more on one side than the other — a visible sign even on a single cake or tray of cookies. View 2720 Element MDL Watchdog High A cooking cycle starts normally but is cancelled partway through when the watchdog fires and drops the load drives. View 5121 Upper Cavity Over-Temp High A bake, broil, or convection program cancels abruptly mid-cycle when the cavity temperature sensor reports a reading above the safe operating limit. View 5220 Relay Board Over-Temp High Long cooking sessions — roasts, baked dishes, holiday meals — are the most common trigger because extended cook time lets heat accumulate in the relay board area. View F1 Door Lock Malfunction High The oven begins a clean cycle, attempts to drive the door lock, and cancels within 60 seconds without producing any heat. View

Wolf OvenError Codes