Samsung Dryer Error Code AC — Incorrect Power Supply Voltage
What this means
The AC error code indicates the dryer's control board has detected that the incoming power supply voltage is outside the normal range. Samsung electric dryers require a 240V outlet (in North America) split across two 120V legs. If one leg is missing (due to a tripped breaker, a blown fuse, or a faulty outlet), the dryer receives only 120V and cannot heat. Gas dryers on 120V may also show this if voltage drops too low.
Alternate codes: AC1, aC
Step-by-step fix
4 stepsCheck the circuit breaker
Go to your electrical panel and find the double-pole breaker for the dryer (usually 30 amps). If one pole has tripped while the other stayed on, the dryer gets only half voltage. Switch the breaker fully off, then back on.
On some panels, a tripped breaker does not move all the way to the OFF position — it rests in the middle. Push it to OFF first, then to ON.
Test the dryer outlet voltage
Using a multimeter set to AC voltage, test the dryer outlet. Between the two angled slots you should read 240V (220–250V is acceptable). Between each angled slot and the neutral slot, read 120V each. If one side reads 0V, that leg is dead.
If you are not comfortable testing a live 240V outlet, call an electrician.
Check the power cord connections
Unplug the dryer. Remove the electrical access panel at the back of the dryer. Verify that the power cord terminals are tight on the terminal block. A loose connection can cause voltage drop.
On a 4-prong cord, ensure the green ground wire is attached to the dryer frame and the white neutral is on the center terminal.
Inspect for a damaged power cord
Examine the entire length of the power cord for cuts, burns, or melted insulation. A damaged cord can cause intermittent voltage issues. Replace the cord if any damage is found.
Do not use electrical tape to repair a dryer power cord — always replace the entire cord.
When to call a professional
If the breaker trips repeatedly or the outlet voltage is incorrect, call a licensed electrician. There may be a wiring fault in your home's electrical circuit.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Dryer Power Cord (4-prong, 30A)
Part #Generic — match plug type to outlet · $15–$30
If cord is damaged or burned
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