Dacor Oven F30 Error: Lower oven sensor fault
This dacor oven f30 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F30 Means on a Dacor Oven F30 is the double-oven equivalent of F3 — but specific to the lower oven cavity. Dacor DOC30 and DOC36 double wall ovens use separate RTD sensors for […]
~40%
DIY Fixable
From $140
Typical Repair Cost
45-90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The lower oven cannot regulate temperature without a working sensor. The upper oven may still be usable if it shows no faults.
Can I reset the code?
Yes. Power cycling may temporarily clear F30 if the sensor wire connection is intermittent. A permanently failed sensor requires replacement.
When to stop immediately?
Stop if you notice: F30 is persistent across multiple power cycles, Both oven cavities show error codes simultaneously.
Symptoms You May Notice
Upper oven runs but lower does not heat
On Dacor double-wall ovens, the upper cavity functions normally but the lower cavity will not heat in any mode and shows F30.
Lower oven sensor reads incorrectly
The temperature display for the lower cavity shows an incorrect reading or dashes while the upper oven displays normally.
F30 appears when lower oven is selected
Selecting any cooking mode for the lower cavity immediately produces the F30 fault without any heating attempt.
Lower oven may partially preheat then stop
The lower cavity begins to warm but stops heating partway through preheat as the sensor fault becomes apparent to the control board.
Possible Causes
Lower oven RTD sensor failure
The temperature sensor probe in the lower cavity has failed open or shorted, similar to F3 but isolated to the lower oven on dual-oven models.
DIY PossibleLower oven sensor wiring damage
The wiring connecting the lower sensor to the board has been damaged by heat or mechanical stress between the two oven cavities.
Requires ProfessionalSafe Checks You Can Do
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1
Measure lower sensor resistance
With the breaker off, access the lower oven sensor (rear wall of lower cavity) and measure resistance. Should read approximately 1080 ohms at room temperature.
The lower sensor is identical to the upper — if upper works fine, you can swap them to confirm which sensor has failed.
Tools required -
2
Inspect wiring between cavities
Check the sensor wire routing between the upper and lower ovens for pinch damage, especially where wires pass through the divider plate.
Heat from self-clean cycles accelerates wire insulation degradation in the divider area.
When to Call a Professional
Contact a qualified technician if:
- Lower oven sensor access on double-wall models often requires partial unit removal from the cabinet
- If sensor and wiring test good, the lower oven control board input has failed
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