mypros+
Error code reference

Samsung Refrigerator Error Code d5

Freezer Compartment defrosting heater error

Samsung codesSamsung refrigerator codes

Freezer Compartment defrosting heater error - wire cut, short-circuit, contact failure, missing sensor housing, or defective temperature fuse/bi-metal. Can also be caused by a temperature reading > 150°F or < -58°F.

MyPros+ Max

Get the full diagnostic procedure for d5.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What d5 means on a Samsung refrigerator

The d5 error code on a Samsung refrigerator indicates a fault in the freezer compartment defrost heater circuit. This system is responsible for periodically melting frost accumulation off the evaporator coils. When the control board detects an anomaly in this circuit, it logs the d5 code and may suspend or interrupt normal defrost cycles, which can eventually lead to ice buildup on the evaporator and reduced cooling performance throughout the unit.

The fault can originate from several points in the defrost circuit. A wire cut or broken connection in the heater wiring harness will interrupt current flow, while a short circuit can cause overcurrent conditions the board reads as a fault. Contact failure at any connector along the defrost circuit produces intermittent or complete signal loss. A missing or improperly seated sensor housing can prevent the temperature sensor from reading accurately, and a defective temperature fuse or bi-metal thermal cutout will open the circuit if it has tripped or failed outright.

The d5 code also triggers when the defrost temperature sensor reports values outside an acceptable operating range, specifically a reading above 150 degrees Fahrenheit or below negative 58 degrees Fahrenheit. Readings at either extreme typically indicate a failed or disconnected sensor rather than actual temperature conditions inside the freezer. Diagnosing d5 requires checking wiring continuity, connector integrity, sensor resistance at known temperatures, and the continuity of the thermal fuse and bi-metal components in the defrost circuit.

Source: manufacturer service documentation.

Common causes of d5

  1. 01

    Defective or tripped thermal fuse or bi-metal cutout

    Part replacement

    The thermal fuse or bi-metal cutout in the defrost circuit opens permanently or trips when exposed to excessive heat, cutting off the circuit. Check continuity across both components with a multimeter; a reading of no continuity confirms failure.

  2. 02

    Failed or disconnected defrost temperature sensor

    Part replacement

    A faulty sensor will report temperatures outside the valid range (above 150 degrees F or below negative 58 degrees F), triggering the d5 code. Inspect the sensor's connector and test its resistance at a known temperature to determine if it is out of specification.

  3. 03

    Wiring harness damage or wire cut

    Wiring / connection

    Physical damage to the wiring in the defrost heater circuit, including cuts, pinches, or breaks, will interrupt the circuit and register as an error. Visually inspect the harness routing in the freezer compartment and test each wire for continuity.

  4. 04

    Connector contact failure

    Wiring / connection

    Corroded, loose, or backed-out connector pins at any junction in the defrost circuit can cause intermittent or complete signal loss. Unplug and reseat all connectors in the defrost circuit and check the terminals for corrosion or damage.

  5. 05

    Missing or improperly seated sensor housing

    Part replacement

    If the sensor housing that positions the temperature sensor against the evaporator is absent or dislodged, the sensor cannot read accurately and the control board may log a d5 fault. Confirm the housing is present and correctly seated around the sensor.

See the test procedure for each cause

Frequently asked questions about d5

What does d5 mean on a Samsung refrigerator?
The d5 code indicates a fault in the freezer compartment defrost heater circuit. It can be caused by a wire cut, short circuit, contact failure, missing sensor housing, or a defective thermal fuse or bi-metal cutout. It also appears when the defrost temperature sensor reports a value above 150 degrees Fahrenheit or below negative 58 degrees Fahrenheit, which typically signals a sensor failure rather than an actual temperature extreme.
Can I fix a d5 error on my Samsung refrigerator myself?
Some causes of the d5 code are accessible to a knowledgeable DIYer. You can inspect connectors, reseat wiring, and test the thermal fuse and bi-metal for continuity with a basic multimeter. However, replacing the defrost heater assembly, thermal fuse, or temperature sensor requires purchasing the correct parts and working safely around the refrigerant-containing evaporator coils. If you are not comfortable with appliance disassembly, a technician is recommended.
Is it safe to keep using my refrigerator when the d5 code is showing?
Continuing to run the refrigerator with an active d5 error is not recommended for the long term. A non-functioning defrost system will allow frost to build up on the evaporator coils, which progressively restricts airflow and reduces cooling performance in both the freezer and fresh food compartments. Food safety can become a concern if temperatures rise sufficiently.
Will resetting my Samsung refrigerator clear the d5 error code?
A reset may temporarily clear the d5 code from the display, but it will not resolve the underlying fault. If the defective component, broken wire, or failed sensor is still present, the code will return once the control board runs its next defrost cycle check. The root cause must be diagnosed and repaired to permanently clear the error.
How much does it cost to repair a Samsung refrigerator d5 error?
Repair costs vary depending on which component has failed. Parts such as a thermal fuse or bi-metal cutout are relatively inexpensive, typically in the range of $10 to $40. A replacement defrost temperature sensor generally costs between $20 and $60. If a technician is needed, labor charges will add to the total, and a complete service call for defrost circuit diagnosis and repair commonly falls in the range of $150 to $350 depending on your location and the parts required.

Related Samsung refrigerator codes

All Samsung refrigerator codes
View all 662 Samsung refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass