How do I fix error code AUTOFILL-OVERFLOW on a Samsung refrigerators?

1. undefined: Open the rubber cap on the AutoFill pitcher and drain any accumulated water 2. undefined: Check if indicators stop blinking and go solid after draining — if so, error is cleared 3. undefined: If indicators continue blinking, check voltage at CN40 pin 16 to CN40 pin 18 4. undefined: 0V to 4.5V = water detected (overflow condition persists); 4.5V to 5V = normal 5. undefined: If water is drained but voltage stays below 4.5V, water level sensor may be failed

Samsung Refrigerators2020–present

Error Code AUTOFILL-OVERFLOW

Q: What does error code AUTOFILL-OVERFLOW mean on a Samsung refrigerators?

AutoFill pitcher overflowed or its water sensor failed Pitcher overflow — water leaked into the fill area; Failed water level sensor in AutoFill pitcher; Kinked or leaking water supply line to pitcher; Pitcher not seated correctly under fill spout

AutoFill pitcher overflowed or its water sensor failed

Moderate

Address soon - your appliance may not work properly

Also displayed as: AutoFill indicators blink (autofill overflow error)

What This Means

Pitcher overflow — water leaked into the fill area; Failed water level sensor in AutoFill pitcher; Kinked or leaking water supply line to pitcher; Pitcher not seated correctly under fill spout

What actually causes this:

The automatic water pitcher either overflowed or the sensor that detects the water level has malfunctioned.

First Thing to Check

Open the rubber drain cap on the AutoFill pitcher (located on the door) and drain any accumulated water — wait for the blinking to stop.

Parts Involved

AutoFill pitcher assemblyWater level sensorMain PCBCN40 connector

How to Fix

1
Open the rubber cap on the AutoFill pitcher and drain any accumulated water
2
Check if indicators stop blinking and go solid after draining — if so, error is cleared
3
If indicators continue blinking, check voltage at CN40 pin 16 to CN40 pin 18
4
0V to 4.5V = water detected (overflow condition persists); 4.5V to 5V = normal
5
If water is drained but voltage stays below 4.5V, water level sensor may be failed

This Error Applies To

Samsung RF28T5 Series Refrigerators (2020) (2020–present)

Service manual exact match: RF28T5101SR/AAService manual exact match: RF28T5A01S9/APService manual exact match: RF28T5021S9/EMService manual exact match: RF28T5001S9/MLService manual exact match: RF28T5021B1/COService manual exact match: RF28T5A01SR/AAService manual exact match: RF28T5021SR/AAService manual exact match: RF28T5001SR/AA