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Error code reference

Samsung Refrigerator Error Code Fridge 2nd digit b

Fridge sensor error

Samsung codesSamsung refrigerator codes
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What the Fridge 2nd digit b error code actually means

Your Samsung refrigerator is showing an error because the temperature sensor inside the fridge compartment is sending back a reading that is completely out of the normal range, which usually means a wiring problem or a faulty sensor. The refrigerator cannot accurately monitor its own temperature when this happens, which could affect food safety. A technician will need to inspect the sensor and its wiring to find and fix the cause.

Diagnostic procedure

The full Fridge 2nd digit b procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check voltage between MAIN PCB CN30 #3 and #6; should be within 4.5V~1.0V.
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Most common causes of Fridge 2nd digit b

Ranked by how often they cause this code
  1. 1Disconnected or slipped connector
  2. 2Damaged or cut sensor wiring
  3. 3Failed fridge temperature sensor
  4. 4Corroded or open-contact connector pins
  5. 5Faulty main PCB

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Questions people ask about Fridge 2nd digit b

What does Fridge 2nd digit b mean on a Samsung refrigerator?
This error code indicates a fridge compartment temperature sensor fault. The main control board is receiving a signal that falls outside the valid sensing range, either at or above +50°C or at or below -50°C. This typically points to a disconnected connector, damaged wiring, or a failed sensor rather than an actual temperature extreme inside the fridge.
Is it safe to use my Samsung refrigerator while this error is displayed?
Because the control board cannot reliably read the fridge compartment temperature when this error is active, the refrigerator may not regulate cooling correctly. Food stored inside could be at risk if the cooling cycle is disrupted. It is best to minimize use and check food temperatures with a separate thermometer until the fault is diagnosed and repaired.
Will resetting my Samsung refrigerator clear the Fridge 2nd digit b error code?
A power reset may temporarily clear the error code from the display, but if the underlying fault in the sensor circuit still exists, the code will return once the board runs its diagnostic checks again. The only way to permanently clear this error is to identify and correct the wiring, connector, or sensor problem that is causing the out-of-range temperature reading.
Can I fix the Fridge 2nd digit b error myself?
Some causes, like a slipped connector at the main PCB, can be addressed by a confident DIYer who is comfortable working with appliance electronics. You would check the voltage at CN30 pins 3 and 6 and inspect the wiring harness for visible damage. However, if the sensor or main PCB needs replacement, most homeowners will want to hire a qualified appliance technician to complete the repair safely.
How much does it cost to repair the Fridge 2nd digit b error on a Samsung refrigerator?
Repair costs vary depending on the root cause. If only the sensor needs replacement, parts and labor typically range from around $100 to $250. If the main PCB is at fault, costs can range from $200 to $450 or more depending on the model and labor rates in your area. A proper diagnosis is important before committing to any parts purchase.

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