Dacor Freezer F1 Error: Freezer sensor failure
This dacor freezer error code f1 guide explains what this fault means for your Dacor appliance and how to respond safely. What Error Code F1 Means Error code F1 on Dacor DRZ24 and DRZ30 column freezers indicates a cabinet temperature sensor failure. The control board is receiving an invalid reading from the NTC thermistor, making […]
20%
DIY Fixable
From $225
Typical Repair Cost
60-90 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. F1 on a column freezer means temperature regulation is unreliable. Transfer frozen food to another freezer immediately to prevent spoilage.
Can I reset the code?
No. A power-cycle may temporarily clear F1 but the code returns if the thermistor, wiring, or board is faulty.
When to stop immediately?
Stop if you notice: Stop if F1 returns within minutes of the power-cycle reset., Stop if you find heat-damaged or melted wiring near the sensor or board..
Symptoms You May Notice
Cabinet temperature drifting above set point
Frozen food begins to soften or show signs of partial thaw as the freezer warms beyond -18°C without the control board correcting the compressor output.
F1 displayed on control panel
The DRZ24/DRZ30 display shows F1 along with an audible alarm tone signaling a sensor fault.
Compressor runs continuously
Without valid temperature feedback the board commands continuous compressor operation, increasing wear and energy consumption.
Erratic fan cycling
The evaporator fan cycles on and off at irregular intervals as the control board attempts to compensate for absent temperature data.
Possible Causes
Failed NTC thermistor
The column freezer cabinet thermistor has drifted out of range or failed open, sending an invalid resistance to the control board.
DIY PossibleLoose or corroded sensor connector
The thermistor wiring connector at the sensor or PCB is loose, corroded, or has a broken pin.
DIY PossibleMain PCB sensor input failure
The control board's thermistor input circuit has failed, requiring board replacement.
Requires ProfessionalSafe Checks You Can Do
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1
Power-cycle the freezer
Unplug the DRZ24/DRZ30 for 60 seconds, then restore power. If F1 clears and stays clear for 30 minutes, the fault was transient.
A transient F1 often coincides with a power event. If PF appeared before F1, treat it as a power recovery sequence.
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2
Inspect the sensor connector
Access the interior back panel of the column freezer (2–4 screws) and locate the thermistor plug. Unplug and firmly re-seat the connector. Inspect for corrosion or bent pins.
Column freezer thermistors are often clipped to the evaporator coil housing — look for a small cylindrical component with two wire leads.
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3
Measure thermistor resistance
At -18°C (0°F) the freezer thermistor should read approximately 32–36kΩ. At room temperature (25°C) expect ~10kΩ. OL or 0Ω indicates a failed sensor requiring replacement.
Warm the sensor gently in your hand; if resistance drops proportionally it is functional — suspect the wiring or board instead.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Thermistor resistance is within specification but F1 persists — control board replacement required.
- Wiring harness shows heat or moisture damage requiring splice repair.
- Unit is under Dacor's limited warranty — DIY sensor replacement may affect coverage.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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