Samsung · Dryer Serious
FE — Frequency / AC Line Error
The main control board detected an out-of-spec line frequency on the AC input. Almost always a power supply problem (bad outlet wiring, ground issue) or a failed PCB.
- Keep using it?
- Limited use only
- DIY difficulty
- Hard
- Verified against
- samsung.com ↗
How to fix it
- Verify the dryer is on standard 60Hz (US) utility power — not a generator.
- Test the outlet wiring with a circuit analyzer — neutral, hot, ground must be correct.
- Tighten the neutral connection at the outlet and at the panel.
- Reset breaker and test.
- If outlet is verified good, the main control board needs replacement.
- An electrician should verify panel-side neutral if FE persists across outlets.
Why it happens
Typical signs: FE on display · Dryer immediately faults at power-up · Display behaves erratically · Occasional resets during cycle
- Improper outlet wiring / missing neutral Recently rewired outlet with neutral and ground swapped.
- Generator or inverter power source Non-utility power with unstable frequency.
- Failed main control board PCB frequency detection circuit failed.
- Loose neutral connection Neutral floating, board sees garbled AC waveform.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Samsung dryer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.