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Samsung Refrigerator Not Cooling: Troubleshooting and Repair

Quick Answer

If your Samsung refrigerator isn't cooling, the most likely culprit is a clogged condenser coil or a frosted-over evaporator fan. Check the coils underneath for dust and listen for a fan hitting ice in the back of the freezer. Cleaning the coils or replacing a $20 defrost sensor usually solves the problem.

In fifteen years of running service calls, a Samsung fridge that stops cooling usually isn't a dead compressor. It's almost always the defrost system, and ice is slowly choking off airflow until nothing reaches the fridge section. If you heard a sound like a playing card in bicycle spokes before it stopped cooling, your evaporator fan was hitting ice. That's textbook defrost failure, and it's fixable for under $60 in most cases.

SamsungRefrigeratorSeverity: highDifficulty: advanced78% DIY Success
Time to Fix
45–120 min
Difficulty
advanced
Parts Cost
$15 – $85
Tools Needed
Phillips #2 screwdriver, Flathead screwdriver

Samsung Refrigerator Not Cooling: Troubleshooting and Repair

Don't rush out and buy a new fridge just yet. Most Samsung cooling failures come down to the defrost cycle going haywire or something as simple as dirty coils. The parts you need are usually under $60 and you'll find them at any local appliance parts supplier or online. This is one of those repairs that sounds complicated but once you know what you're looking for, it's totally manageable.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Dust-clogged condenser coils25%
Faulty defrost thermistor25%
Failed evaporator fan motor20%
Defrost heater assembly failure15%
Main PCB relay failure15%

Symptoms You May Notice

  • Fresh food section feels like a warm closet, bread going stale fast, leftovers spoiling, but the freezer's still making ice just fine.
  • Grinding or flicking noise coming from behind the freezer back panel, especially right after the compressor kicks on.
  • Solid sheet of ice covering the entire back wall of the freezer, or frost packed so thick you can't see the coil vents anymore.
  • Compressor's been running non-stop for hours but the digital display shows temps climbing instead of dropping.
  • Water pooling under the crisper drawers or dripping onto the kitchen floor from underneath the unit.

Can you reset a Samsung refrigerator to clear the NOT-COOLING code?

To reset the control board after a repair, press and hold the Power Cool and Power Freeze buttons simultaneously for 5 to 10 seconds. The display will flash and recalibrate. This often clears 'ghost' error codes that remain after the physical part has been replaced.

Tools Required for Diagnosis

Phillips #2 screwdriverFlathead screwdriverMultimeter with ohms settingCoil cleaning brushVacuum with brush attachmentHair dryer or heat gun for manual defrost10mm socket and ratchetFlashlight or headlamp

Service / Diagnostic Mode

Hold the upper left and upper right buttons on the display panel for 8 seconds to enter self-diagnosis mode.

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test
Expected Range2000–20000 ohms
ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Defrost ThermistorDA32-00006W · $15–$35
Evaporator Fan MotorDA31-00146H · $45–$85

Frequently Asked Questions

Why is my Samsung fridge warm but the freezer is cold?
Almost always an airflow problem. Here's the deal: the freezer makes all the cold air, and a fan blows it into the fridge section through vents in the back wall. If the evaporator coils frosted over because the defrost heater or thermistor failed, those vents get blocked solid and no cold air gets to your food. The freezer still feels cold because it's right next to the coils. But the fridge section is basically starved of airflow. Check the defrost components first, that's where your answer is.
How do I force a defrost on a Samsung refrigerator?
On most Samsung models, press and hold Energy Saver and Fridge at the same time for about 8 seconds until the display goes blank. Then press Fridge until you see 'Fd' on the screen. That's Force Defrost mode. The heaters kick on and start melting ice. You'll hear dripping and hissing, that's totally normal. Let it run until the dripping stops, usually 20 to 30 minutes. Then hold Power Cool and Power Freeze together for 5 seconds to reset. Heads up though, this is a temporary fix if a defrost component is actually failed.
Where can I find parts for my Samsung refrigerator locally?
Most appliance parts suppliers will have common Samsung items like thermistors, fan motors, and defrost heater kits in stock. Bring your model number. It's on a sticker inside the fridge on the left wall, usually near the top. Samsung has revised their defrost kit several times, so a good local supplier will make sure you get the updated version and not the one that failed in the first place. Online works too, but local means you can swap and return same day if you grabbed the wrong part.
Is it worth fixing a 7-year-old Samsung refrigerator?
If it's a sensor, fan motor, or defrost heater, yeah, fix it. Those repairs are usually under $150 in parts and a couple hours of your time. But if the sealed system failed, meaning the compressor or a refrigerant leak, that's a different conversation entirely. Sealed system repairs run $400 to $700 with labor and you're putting that money into a 7-year-old appliance. Rule of thumb: if the repair is less than half the cost of replacement, fix it. Otherwise start shopping.
How long does it take for a Samsung fridge to cool back down after a repair?
Give it a full 24 hours before you really trust it. Right after you fix a defrost issue or clean the coils, the fridge has to pull everything down from near-room temp, and that takes time. I usually tell people to wait 4 hours before putting food back in, and keep the doors closed as much as possible. If it's still not reaching temp after 24 hours with the doors barely touched, something else is still going on and you've got more digging to do.

Models Known to Experience NOT-COOLING Errors

This repair applies to most Samsung refrigerators with this error code. Common model numbers include:

RF28R7351SR, RF263BEAESR, RS25H5111SR, RF23J9011SR, RB12J8896S4, RF28HMEDBSR, RF22K9381SR, RF28K9380SR

MS

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on May 20, 2024