Dacor Range F3 Error: Oven temp sensor shorted
This dacor range f3 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F3 Means on a Dacor Range F3 signals a shorted oven temperature sensor. The control board detects near-zero resistance and disables the oven burner to prevent runaway heating. Surface burners are unaffected. Most […]
~40%
DIY Fixable
From $150
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 safely.
Can I reset the code?
No. F3 requires sensor or wiring repair. Power cycling will not fix a physically broken sensor.
When to stop immediately?
Stop if you notice: Do not use the oven — the control board cannot regulate temperature with a shorted sensor, Surface burners may continue to be used while awaiting repair.
Symptoms You May Notice
Oven refuses to heat in any mode
Selecting bake, broil, convection, or any cooking mode immediately triggers F3 with no heating activity. The unit is completely locked out.
Temperature display shows impossibly high reading
The control panel may briefly display a temperature reading above 900 degrees F at startup because the shorted sensor reports near-zero resistance.
Self-clean cycle cannot be initiated
The control board blocks self-clean because the abnormally low sensor resistance makes the board believe the cavity is already at extreme temperature.
Control panel beeps repeatedly at power-on
On Modernist series ranges, the board detects the fault immediately at power-up and sounds repeated alert tones before displaying F3.
Possible Causes
Internally shorted RTD temperature sensor
The platinum element inside the RTD probe has developed an internal short, dropping resistance to near zero ohms. The board interprets this as an impossibly high temperature.
DIY PossiblePinched or grounded sensor wiring
The sensor harness is pinched against the oven chassis or a sharp metal edge, shorting one or both conductors to ground and producing a low-resistance reading.
Requires ProfessionalSafe Checks You Can Do
-
1
Measure sensor resistance
Turn off the 240V breaker. Disconnect the RTD sensor at its connector behind the oven and measure resistance across the two leads with a multimeter set to the 2000-ohm range.
A reading below 500 ohms (or near zero) at room temperature confirms the sensor is shorted and must be replaced. Normal is about 1080 ohms.
Tools required -
2
Check harness for pinch points
Trace the sensor wiring from the rear cavity wall through any grommets or brackets to the control board connector. Look for crushed insulation or bare wire touching the chassis.
On Dacor Professional 48-inch models, the harness passes through a tight bracket near the rear panel that can pinch wires during service or installation.
When to Call a Professional
Contact a qualified technician if:
- Probe resistance reads near 0 ohms — replace the RTD probe (part varies by model)
- Harness shows physical damage inside the oven cavity — professional rewiring needed
- New probe installed but F3 persists — control board likely shorted internally
Need Professional Help?
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