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Error code reference

Samsung Refrigerator Error Code R-1-g

R-DEF Error (Refrigerator defrost error)

Samsung codesSamsung refrigerator codes
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What the R-1-g error code actually means

Your Samsung refrigerator is showing this error because it detected a problem with the system that periodically melts frost off the cooling coils inside the fridge section. Either a part in that defrost system has failed, a wire has come loose, or the frost-melting process took too long to finish. Until this is repaired, your refrigerator may not cool properly and frost can build up on the coils.

Diagnostic procedure

The full R-1-g procedure

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of R-1-g

Ranked by how often they cause this code
  1. 1Blown thermal (temperature) fuse
  2. 2Failed or open defrost heater element
  3. 3Loose, corroded, or separated wiring connector
  4. 4Defrost heater housing separation
  5. 5Faulty defrost termination sensor or thermostat

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Questions people ask about R-1-g

What does R-1-g mean on a Samsung refrigerator?
The R-1-g code indicates a refrigerator compartment defrost error, known as an R-DEF fault. It means the control board detected a problem with the defrost heater circuit, such as a failed heater, a blown thermal fuse, a wiring contact error, a short circuit, or a defrost cycle that ran continuously for more than 80 minutes without completing. This fault affects the refrigerator section specifically, not the freezer compartment.
Will resetting my Samsung refrigerator clear the R-1-g error?
Unplugging the refrigerator or resetting the control board may temporarily clear the code from the display, but the error will return if the underlying fault in the defrost circuit has not been repaired. A reset does not fix a blown fuse, a failed heater, or a bad connection. The code should be treated as a symptom that requires component-level diagnosis, not just a soft reset.
How much does it cost to repair the R-1-g defrost error on a Samsung refrigerator?
Repair costs vary depending on which component has failed. A replacement thermal fuse or defrost heater element typically costs between 10 and 50 dollars for the part alone. If professional labor is required, total repair costs including diagnosis and installation generally range from 100 to 300 dollars, depending on local labor rates and the specific parts needed.
Can I fix the R-1-g error myself, or do I need a technician?
Some causes, like a loose wiring connector, can be addressed by a confident DIYer who is comfortable unplugging the refrigerator and accessing the evaporator panel. However, diagnosing a blown thermal fuse or a failed heater element requires a multimeter and familiarity with appliance wiring. If you are not comfortable working around electrical components inside the refrigerator cabinet, calling a qualified technician is the safer choice.
Is the R-1-g error dangerous, and is it safe to keep using the refrigerator?
The error itself does not create an immediate safety hazard in most cases, since the control board limits continuous heater operation. However, running the refrigerator with a defrost fault will allow frost to accumulate on the evaporator coils, eventually blocking airflow and causing the compartment to warm up. Food spoilage is the main risk if the issue is left unaddressed for an extended period.

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