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What Is the Samsung Refrigerator DC Motor Cooling Fan DA31-00340A / DA31-00278C?
The Samsung DA31-00340A (also cross-referenced as DA31-00278C) is an OEM-specification DC motor cooling fan designed for Samsung refrigerator evaporator compartments. It circulates cold air from the evaporator coil through the fresh-food and freezer compartments to maintain even, consistent temperatures throughout the appliance. When this fan fails, you may notice the freezer staying cold while the refrigerator section warms up, unusual humming or clicking sounds from behind the rear panel, or a complete loss of airflow. The fan uses a brushless DC motor for quiet, energy-efficient operation and long service life in the cold, humid environment inside a refrigerator cabinet. As a genuine Samsung-compatible replacement part, it matches the original fan's mounting hole pattern, connector type, RPM, and airflow specification -- ensuring proper thermal performance without modifications.
In short: A replacement DC evaporator fan motor for Samsung refrigerators (DA31-00340A / DA31-00278C) that restores proper cold air circulation when the original fan has failed. Supplied new by koeed.com.
Technical Specifications
| Part Numbers |
DA31-00340A (primary), DA31-00278C (cross-reference / superseded) |
| Compatible Brand |
Samsung Refrigerator |
| Motor Type |
DC Brushless Motor |
| Function |
Evaporator Compartment Air Circulation Fan |
| Application |
Built-in refrigerator evaporator cooling |
| Condition |
New |
DA31-00340A and DA31-00278C are both valid Samsung part numbers for this fan assembly. DA31-00340A may be the later revision. Always verify your refrigerator's exact model number (found on the rating label inside the fresh-food compartment) against Samsung's parts diagrams before ordering. Unplug the refrigerator and discharge capacitors before accessing the evaporator compartment.
Symptoms of a Failed Evaporator Fan
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Uneven temperatures: Freezer compartment remains cold while the fresh-food section gradually warms up, as cold air is no longer being pushed between compartments
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Unusual noise: A loud buzzing, humming, or clicking sound from the rear interior panel that changes pitch or comes and goes with the compressor cycle
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Fan not spinning: The fan blade is stationary despite the compressor running; often caused by ice blockage, bearing seizure, or a failed motor winding
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Excessive frost buildup: Thick frost or ice accumulation on the evaporator cover near the fan opening indicates poor airflow due to a slow or seized fan
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Refrigerator runs constantly: The compressor never cycles off because the thermostat never reaches setpoint due to lack of cold air circulation
Frequently Asked Questions
How do I confirm that the fan is the problem and not the control board?
If you hear the fan humming or clicking, the control board is sending power and the fan motor is receiving voltage but cannot spin (mechanical failure). If the fan is completely silent and the compressor is running, use a multimeter to check for DC voltage at the fan connector -- Samsung evaporator fans typically run on 12V DC from the main control board. If voltage is present at the connector but the fan does not run, the fan is faulty. If no voltage is present, the control board or wiring harness may be the issue. Always unplug the refrigerator before probing live circuits.
What is the difference between DA31-00340A and DA31-00278C?
Both numbers refer to the same functional component -- the evaporator fan motor assembly. DA31-00278C may be an earlier production version that was superseded by DA31-00340A in Samsung's parts system. The mounting dimensions, connector type, voltage, and airflow specifications are interchangeable. Samsung occasionally revises part numbers when changing suppliers or making minor manufacturing improvements without altering fit or function. If your original fan has either number, this replacement will work.
Does this fan include the mounting bracket and foam gasket?
The fan is supplied as the motor-and-blade assembly with its integral wiring harness and connector. The plastic mounting bracket, shroud, foam insulation gaskets, and screws are part of the refrigerator's internal evaporator housing and should be reused from the old installation. Carefully preserve all mounting hardware and foam seals when removing the old fan -- torn or missing foam gaskets can allow warm, moist air to bypass the evaporator coil, causing frost buildup and reduced efficiency.
Will this fit my specific Samsung refrigerator model?
The DA31-00340A fan is used across a broad range of Samsung bottom-freezer, side-by-side, and French-door refrigerator models. To confirm compatibility, locate your refrigerator's full model number on the rating plate (typically inside the fresh-food compartment on the left wall or ceiling) and cross-reference it with Samsung's online parts catalog. If your existing fan has a different part number, contact KOEED with both numbers and we can verify interchangeability before shipping.
Can ice buildup cause the fan to fail, or is it the other way around?
Both scenarios are possible. A failing defrost heater or defrost thermostat can cause ice to accumulate on the evaporator coil until it physically blocks the fan blade, stalling the motor and eventually burning out the winding. Conversely, a slow or failed fan reduces airflow across the evaporator, causing abnormally low coil temperatures and excessive frost that worsens the blockage. When replacing the fan, inspect the defrost heater element and defrost thermostat for continuity. If either is open-circuit, replace them at the same time to prevent the new fan from suffering the same fate.
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Samsung Refrigerator DC Motor Cooling Fan DA31-00340A / DA31-00278C — Supplied by koeed.com. All trademarks are property of their respective owners.
