How do I fix error code AUTOFILL_OVERFLOW on a Samsung refrigerators?

1. undefined: Check voltage at MAIN PCB CN90 pins 11 and 13 2. undefined: 0V~4.5V = water overflow detected; 4.5V~5V = no problem 3. undefined: Inspect the overflow switch and AutoFill case for water accumulation

Samsung Refrigerators2023–present

Error Code AUTOFILL_OVERFLOW

Q: What does error code AUTOFILL_OVERFLOW mean on a Samsung refrigerators?

AutoFill pitcher has overflowed AutoFill pitcher overflow; Float or overflow switch stuck or defective; Water fill valve not closing

AutoFill pitcher has overflowed

Moderate

Address soon - your appliance may not work properly

Also displayed as: Blinks on display

What This Means

AutoFill pitcher overflow; Float or overflow switch stuck or defective; Water fill valve not closing

What actually causes this:

The auto-fill pitcher has filled beyond its capacity, usually because the water shutoff sensor or fill valve has failed.

First Thing to Check

Open the fridge and check if the AutoFill pitcher area or tray has standing water.

Parts Involved

AutoFill CaseOverflow SwitchWater Inlet Valve

How to Fix

1
Check voltage at MAIN PCB CN90 pins 11 and 13
2
0V~4.5V = water overflow detected; 4.5V~5V = no problem
3
Inspect the overflow switch and AutoFill case for water accumulation

This Error Applies To

Samsung RF23BB89 Series Refrigerators (2023) (2023–present)

Service manual exact match: RF29BB89***Service manual exact match: RF24BB66***Service manual exact match: RF30BB62***Service manual exact match: RF29BB82***Service manual exact match: RF30BB69***Service manual exact match: DRF36C300**Service manual exact match: RF24BB69***Service manual exact match: RF30BB66***+2 more