Dacor Oven F31 Error: Lower oven over-temperature
This dacor oven f31 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F31 Means on a Dacor Oven F31 is the lower-oven counterpart to F2, exclusive to Dacor double-wall oven models such as the DOC30 and DOC36. It triggers when the lower cavity sensor detects […]
~30%
DIY Fixable
From $160
Typical Repair Cost
60-90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The lower oven exceeded its safe temperature limit. Do not use the lower cavity until the sensor or relay fault is diagnosed and repaired.
Can I reset the code?
Yes. After full cool-down, a breaker reset may clear F31 if it was a transient spike. If it returns within 15-20 minutes, the fault is persistent.
When to stop immediately?
Stop if you notice: F31 returns on every lower oven use, Smoke or burning smell is present in the lower cavity.
Symptoms You May Notice
Lower oven overheats and shuts off
The lower cavity on a Dacor double-wall oven exceeds its target temperature significantly and the control board triggers a safety shutoff.
Lower oven food burns at normal settings
Items in the lower cavity are consistently overcooked or scorched at temperatures that work correctly in the upper oven.
F31 returns quickly after each reset
The fault code reappears within 15-20 minutes of operation after clearing, indicating a persistent hardware fault rather than a transient spike.
Smoke from lower cavity only
Burning smell or visible smoke comes specifically from the lower oven while the upper oven operates normally.
Possible Causes
Drifting lower oven RTD sensor
The lower cavity sensor reports temperatures lower than actual, causing the board to keep heating elements energized past the safe limit.
DIY PossibleStuck relay for lower heating circuit
The relay on the EOC board that controls the lower bake element has fused closed, keeping the element powered even when the board signals off.
Requires ProfessionalSafe Checks You Can Do
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1
Cool down and power cycle
Allow the lower oven to cool completely, then cycle the breaker for 5 minutes. Restart the lower oven at 350 degrees F and monitor for 30 minutes.
If F31 does not return within a full 30-minute bake cycle, the fault may have been a transient temperature spike.
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2
Test lower sensor at temperature
If you have an oven thermometer, place it in the lower cavity and compare its reading to what the oven display shows during heating. A variance over 50 degrees suggests sensor failure.
Unlike F30, the sensor is not fully failed — it gives readings but they are inaccurate, so the board allows heating.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Stuck relay on the lower oven heating circuit requires EOC board replacement by a technician
- Do not operate the lower oven if F31 returns within minutes of every reset
Need Professional Help?
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