Error Code SF2
The washer's main computer has malfunctioned
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: SF2
What This Means
Micro controller operation failure on the Main PCB; Main PCB hardware fault
What actually causes this:
The main control board has failed internally — often from a power surge or component aging
First Thing to Check
Unplug the washer for 60 seconds and plug it back in — if the error returns, the main board needs replacement
Parts Involved
How to Fix
- 1
1. Power cycle the washer — unplug for 5 minutes and restart
- 2
2. If the error returns, replace the Assy PCB (Main PBA)
This Error Applies To
Samsung WA45H7000A Series Washers (2024) (2024–present)
Related Error Codes
The washer cannot detect the correct water level inside the tub
The washer's motor cannot spin properly
The washer's vibration sensor has a data reading error
The washer's WiFi module has lost connection to the main board
The washer's display module has lost connection to the main board
The washer's main computer has malfunctioned
The washer's main computer has malfunctioned
The washer cannot detect the water level inside the tub