Dacor Range F1 Error: Oven temp sensor open
This dacor range f1 error code guide explains what this fault means for your Dacor appliance and how to respond safely. What F1 Means on a Dacor Range F1 indicates the oven control board cannot read a valid signal from the RTD temperature sensor. The oven burner locks off immediately. Surface burners are unaffected. Most […]
~35%
DIY Fixable
From $175
Typical Repair Cost
45-90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A control board failure prevents safe temperature regulation. Do not use the oven section until the board is replaced.
Can I reset the code?
Yes. A 5-minute breaker reset may clear F1 temporarily. If it returns during the next cook cycle, the board requires replacement.
When to stop immediately?
Stop if you notice: Stop using the oven immediately — it will not regulate temperature safely, Do not attempt to bypass the sensor; unregulated heat is a fire hazard.
Symptoms You May Notice
Oven stops heating mid-cycle
The oven shuts off during bake or roast and will not resume heating. The cavity temperature drops steadily after the fault triggers.
Display shows dashes instead of temperature
The temperature readout on the Heritage or Modernist control panel shows "---" or "000" because the board cannot read the RTD probe.
Self-clean mode refuses to start
Pressing self-clean results in an immediate F1 fault because the board requires a valid sensor reading before engaging the door lock.
Oven takes abnormally long to preheat
Before a full F1 lockout, the oven may cycle erratically during preheat, overshooting or undershooting the target by 50 degrees F or more.
Possible Causes
Open-circuit RTD temperature sensor
The platinum RTD probe mounted on the rear oven wall has developed an open circuit, sending infinite resistance to the control board. Common on Heritage models after 8-10 years of use.
DIY PossibleDamaged sensor wiring harness
The two-wire harness connecting the RTD probe to the electronic control board has melted, pinched, or cracked from repeated self-clean heat exposure, breaking the circuit.
Requires ProfessionalFailed electronic control board input circuit
The analog-to-digital converter on the control board that reads sensor resistance has failed, causing the board to misinterpret a healthy sensor as open.
Requires ProfessionalSafe Checks You Can Do
-
1
Power cycle at the breaker
Turn off the dedicated 240V breaker for the range for a full 5 minutes to allow the control board capacitors to discharge, then restore power and attempt a bake cycle.
If F1 does not return within one full preheat cycle, the fault was a transient glitch caused by electrical noise.
-
2
Measure RTD sensor resistance
With the breaker off, locate the RTD sensor at the top-rear of the oven cavity. Disconnect its two-pin connector and measure resistance across the sensor leads with a multimeter.
A healthy Dacor RTD reads approximately 1080 ohms at room temperature (70 degrees F). An open-loop (OL) reading confirms sensor failure.
Tools required -
3
Inspect wiring for heat damage
Follow the sensor harness from the rear cavity wall through to the control board connection. Look for melted insulation, darkened connectors, or pinch points where the wire routes past sheet metal.
Heat damage is most common within 6 inches of the sensor mounting bracket on Professional 36-inch and 48-inch models.
When to Call a Professional
Contact a qualified technician if:
- RTD probe measures open (infinite resistance) or below 500 ohms — sensor requires replacement
- Wiring harness shows melting or burn marks near the oven cavity — professional rewiring needed
- Code returns immediately after sensor replacement — control board failure suspected
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
Range Repair Service Schedule Appointment