Samsung Dryer Error Code AC4

AC4Samsung Dryer

What this code means

Communication error between WIFI PBA and MAIN PBA.

First step from the service manual

Remove the WIFI Module and check for any faulty soldering; occurs on line test mode which cannot enter if dry procedure has been completed.

Next steps: diagnose the root cause

1
Verify the error code is active

Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.

2
Get the full diagnostic procedure

Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.

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Related Samsung dryer error codes

0Vent condition is good (vent blockage test result).2EThe machine has temporarily stopped and all buttons except the power button do…3Door switch error3CBLDC motor fault detected by drum inverter.3C1BLDC motor fault (overloading due to too much laundry) detected by drum…3C2BLDC motor fault or inverter PBA fault detected by drum inverter.3C3BLDC motor fault or inverter PBA fault detected by drum inverter.3C4BLDC motor fault or inverter PBA fault detected by drum inverter.3C5BLDC motor fault or inverter PBA fault detected by drum inverter.3C6BLDC motor fault or inverter PBA fault detected by drum inverter.3C7BLDC motor fault or inverter PBA fault detected by drum inverter.3C8BLDC motor fault or inverter PBA fault detected by drum inverter.3CABLDC motor fault or incorrect connections detected by compressor inverter.3CA1BLDC motor fault detected by compressor inverter.3CA2BLDC motor fault detected by compressor inverter.3CA3BLDC motor fault detected by compressor inverter.3CA4BLDC motor fault detected by compressor inverter.3CA5BLDC motor fault detected by compressor inverter.3CA6BLDC motor fault detected by compressor inverter.3CA7BLDC motor fault detected by compressor inverter.3CA8BLDC motor fault detected by compressor inverter.5COverflow detected three times in succession or drain pump does not work.9C1Power condition fault9C2Power condition fault9CA1Power condition fault detected by compressor inverter.9CA2Power condition fault detected by compressor inverter.9EInvalid power source frequency.9E1Electronic control problem (over voltage error).ACElectronic Control ProblemAC6Signals between the main and inverter PBAs are not sensed; incorrect wire…ACACommunication error between main and compressor inverter PBA (compressor…AEElectronic control communication error between PCBs.AE3DR Ready Modem wire test failure.bC2Button Stuck ErrorbEUnit detects a button is being pressed for over 30 seconds or button is stuck…bE2Button errorC1Unit is detecting items inside the drum or there is an error on the dry sensor.C8About 80% of the vent is clogged.C80About 80% of the vent is cloggedC9Over 90% of the vent is clogged.C90Over 90% of the vent is clogged, which may lead to poor drying performance or…CAElectronic control problem (invalid communication).ClgThe vent is clogged.CtThe internal temperature of the dryer is too low (below 32°F) or too high (over…dCDoor Detection ErrordEDoor errordFInvalid state of the door sensor circuit; loose or open wire terminals at the…dORunning the dryer with the door open; invalid state for more than 0.25 seconds.dO dEDoor openE1Thermistor or thermistor circuit shortE3Motor or motor circuit open.EEInvalid state of EEPROM communication.EEEInvalid state of EEPROM communication.EEpromEEPROM failEEprom FailInvalid state of EEPROM communication.EHHeating errorEtCheck the heater thermistor; for gas models, check that gas is supplied…FCInvalid power source frequency detected by the electronic control.FEPower source frequency errorHCInvalid Heating Temperature (Over Heating)HC5Compressor stop accumulated three times due to high temperature detected with…hEInvalid heating temperature detected; heater thermistor malfunction or gas…odInvalid dry time in excess of allowed dry time, possibly due to sensor bar open…OEElectronic control problem / over voltage error.tCThermistor 1 resistance is very low or very high, indicating a faulty cycling…TC2The thermistor resistance is very low or high.tC4Drum IPM temperature sensor issue (very low or high).tC5Thermistor 2 resistance is very low or very high, indicating a faulty vent…tC7Thermistor 3 resistance is very low or high.tC8Thermistor 4 resistance is very low or high.tC9Compressor IPM temperature sensor issue (very low or high).tCAThermistor 5 resistance is very low or high.tEInvalid heating temperature detected, possibly caused by clogged lint screen or…tOThe thermistor resistance is very low or high (alternate display for thermistor…tSThe thermistor resistance is very low or high, indicating a possible clogged…
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