How do I fix Samsung Refrigerator Running Constantly - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Samsung Refrigerator Running Constantly - Causes & Fix?

The most frequently replaced parts for Samsung Refrigerator Running Constantly - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Samsung Refrigerator Running Constantly - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Samsung Refrigerator Running Constantly - Causes & Fix

Q: What does Samsung Refrigerator Running Constantly - Causes & Fix mean?

Usually caused by frost blocking the evaporator fan or a failed defrost thermostat. Check for ice buildup in the freezer and test the defrost system.

Samsung Refrigerator Running Constantly — What’s Happening

A Samsung refrigerator running constantly means the compressor is staying on far longer than normal because the unit cannot reach its set temperature or the control thinks it cannot. This is a symptom, not an error code. The control system keeps calling for cooling because the cabinet temperature stays above target or a sensor is telling it the temperature is too high.

Samsung’s own troubleshooting notes that a blinking display with beeping indicates the refrigerator temperature is too high and a cooling problem must be fixed. If the evaporator coils ice over or airflow is blocked, cooling efficiency drops and the compressor runs continuously trying to compensate. The unit may also run constantly if it is stuck in a forced diagnostic mode, though that is less common in normal use.

Jump to Fix

Most Likely Causes

Defrost failure and evaporator frost buildup A failed defrost thermostat or defrost heater lets the evaporator pack with ice, blocking airflow and forcing the compressor to run nonstop trying to cool.
Evaporator fan blocked or not running Ice around the evaporator fan or a failed fan motor stops cold air from circulating, so the cabinet warms and the compressor stays on.
Dirty condenser coils Dust and debris on the condenser coils reduce heat rejection, making the system work harder and run longer to maintain temperature.
Bad temperature sensor or thermistor A faulty sensor sends incorrect temperature readings to the control board, which then runs the compressor continuously because it thinks the cabinet is warm.
Door seal or door not closing fully A worn gasket or misaligned door lets warm air leak in constantly, triggering continuous cooling cycles.
Control board or compressor-control fault If sensors, fans, and defrost components check out, a main board issue or compressor circuit problem may be keeping the unit in constant run mode.

How to Diagnose and Fix

Verify the complaint and check if the unit is in demo mode, cooling-off mode, or a forced test mode that intentionally runs the compressor continuously.
Check cabinet temperatures and look for a blinking display or temperature alarm, which Samsung says indicates high refrigerator temperature.
Inspect door closure and gasket condition to confirm the doors seal tightly and no warm air is leaking in.
Open the freezer section and inspect the evaporator area for heavy frost or ice buildup around the coils and fan.
Verify the evaporator fan is running and moving air when the door switch is pressed or bypassed.
Pull the unit out and inspect the condenser coils at the back or bottom, cleaning any dust or debris that blocks airflow.
Test the defrost system if frost is present by checking the defrost thermostat, defrost heater continuity, and related wiring.
Test thermistor resistance and wiring connections if the control may not be sensing temperature correctly, especially if a sensor error has appeared before.

Parts You Might Need

Part	Notes
Defrost thermostat	Amazon \| Common cause when evaporator ices over and blocks airflow.
Evaporator fan motor	Amazon \| Needed if the fan does not spin or runs noisy.
Temperature sensor / thermistor	Amazon \| Replace if resistance is out of range or wiring is damaged.
Door gasket	Amazon \| If torn or not sealing, allowing warm air intrusion.

Seeing a code on the display? These match this problem:

When to Call a Pro

Call a tech if you find heavy frost and are not comfortable testing defrost components with a meter, or if the defrost system and airflow check out but the unit still runs constantly. Control board diagnosis and any sealed-system work (compressor, refrigerant, or start components) require a qualified technician with proper tools and refrigerant certification. If the unit has been in constant-run mode for days and the compressor is hot to the touch, shut it down and get professional help to avoid compressor damage.