Dacor Oven F3 Error: Temperature sensor fault
This dacor oven f3 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F3 Means on a Dacor Oven F3 indicates the control board detected an open circuit or short in the RTD (resistance temperature detector) sensor probe. Without a valid temperature reading, the oven control […]
~50%
DIY Fixable
From $120
Typical Repair Cost
30-60 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Without a working temperature sensor, the oven cannot regulate heating. Uncontrolled operation could cause overheating or element damage.
Can I reset the code?
No. F3 requires a hardware fix — the sensor or its wiring must be repaired. Power cycling will not restore a failed sensor circuit.
When to stop immediately?
Stop if you notice: F3 appears every time a cook mode is selected, Oven cavity shows signs of burn damage near the sensor mounting point.
Symptoms You May Notice
Oven will not heat at all
Selecting any cooking mode immediately results in F3 with no heating activity. The display shows "---" for temperature.
Temperature display shows invalid reading
Instead of a normal temperature value, the display shows dashes, zero, or an impossibly high or low number.
Self-clean will not start
Attempting to run self-clean is immediately rejected because the board cannot validate temperature data from the sensor.
Oven attempts to preheat then stops
The oven may briefly activate a heating element, detect the invalid sensor signal, and immediately abort with F3.
Possible Causes
Open or shorted RTD temperature sensor
The sensor probe inside the oven cavity has failed electrically — either an open circuit (infinite resistance) or a short (near zero ohms).
DIY PossibleDamaged sensor wiring harness
The wire between the sensor and the control board has melted, pinched, or cracked from heat exposure, creating an open or short circuit.
Requires ProfessionalSafe Checks You Can Do
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1
Measure sensor resistance
Shut off the breaker, disconnect the sensor wires, and measure resistance with a multimeter. Open circuit (OL) or less than 500 ohms indicates a failed sensor.
Normal reading is approximately 1080 ohms at 70 degrees F.
Tools required -
2
Inspect sensor wiring
Visually inspect the sensor wiring at the rear wall of the oven cavity for melted insulation, loose connectors, or burn marks.
Melted insulation near the sensor mounting point is common after extended self-clean cycles.
When to Call a Professional
Contact a qualified technician if:
- Harness replacement inside a double-wall oven requires partial disassembly — professional recommended
- If sensor and wiring both test good, the EOC board input circuit has failed
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