This is the Duet Sport dryer that we’ll be talking about today. For our DIYers, you’ll be glad you’re working on this model. This is a straightforward, no-frills unit that just works. But, like any machine, certain parts do wear out. Fortunately, the Duet has only a few minor issues that do persist. I’ll talk about the two issues I used to see often. But first, let’s get into the error codes.
First things first. To view the error codes and then clear them, you’ll need to get into the service diagnostics mode. Here’s how to do that:
ACTIVATING the SERVICE DIAGNOSTIC MODE
- Be sure the dryer is in standby mode (plugged in with all indicators off).
- Select any three (3) buttons except POWER, and follow the steps below using the same three buttons. Remember the buttons and the order they were pressed.
Within 8 seconds:
- Press and release the 1st selected button
- Press and release the 2nd selected button
- Press and release the 3rd selected button
- Repeat this 3-button sequence 2 more times
3. If this test mode has been entered successfully, all indicators on the console are illuminated for 5 seconds, with “888” or “88” showing in the Estimate Time Remaining, 2 or 3 digit display. If there are no saved fault codes, all indicators on the console will momentarily turn off, and then only the 7-segment display will come back on and display “888” or “88”.
FAULT/ERROR CODES
Fault/Error Code Display Method
The control displays the fault codes by alternately showing F# and E#.
- All fault codes have an F# and an E#.
- The F# indicates the suspect System/Category.
- The E# indicates the suspect Component system.
- Up to four Fault/Error codes may be stored. When the oldest fault code is displayed, additional presses of the 3rd button will result in a triple beep, then display of the most recent fault code. If each press of the 3rd button results in a triple beep and the display shows “888” or “88”, no saved fault codes are present.
Customer Fault/Error Codes
- PF Power Failure – PF indicates that a power failure occurred while the dryer was running. Press START to continue the cycle, or press POWER to clear the display.
- L2 Low Line Voltage – L2 indicates low L2 voltage (less than 50 V) is detected at the CCU.
- F1E1 Cycle Control Unit (CCU) Problem – Indicates a CCU problem. Verify all connections to and from the CCU. If all connections check good, it’s best to replace the CCU.
- F2E1 User Interface (UI) Problem (stuck button) – Indicates a stuck button (depressed for over 20 seconds) or UI mismatch. This fault code will ONLY appear when in the service diagnostic mode.
- F3E1 Exhaust Thermistor Open – Indicates that the exhaust thermistor is open. Temperature drops below 18° F (> 50k ohms).
- F3E2 Exhaust Thermistor Shorted – Indicates that the exhaust thermistor has shorted. Temperature above 250° F (< 500 ohms).
- F3E3 Inlet Thermistor Open – Indicates that the inlet thermistor is open. Temperature drops below 18° F (>245k ohms).
- F3E4 Inlet Thermistor Shorted – Indicates that the inlet thermistor is shorted. Temperature above 391° F (< 328 ohms).
- F3E5 Inlet and Exhaust Thermistor Open – Indicates that the inlet and exhaust thermistors are open. Will occur if the P14 connector is not plugged into the CCU.
- F3E6 Moisture Sensor Open – Indicates the moisture sensor strip is open. This fault code will only appear when in the service diagnostic mode.
- F3E7 Moisture Sensor Shorted – Indicates that the moisture sensor strip has shorted. This fault code will ONLY appear when in the service diagnostic mode.
- F4E1 Heater Relay or Connector Problem – Indicates no voltage detected at the heater relay. This fault code appears ONLY when in the Diagnostic Test Mode. Unplug dryer or disconnect power and check that the wires are plugged into the heater element(s) and the relay(s) on the CCU.
- F4E3 Restricted Air Flow – Indicates low air flow that may affect dryer performance. Confirm that airflow system is not blocked, check lint screen, exhaust duct, exhaust fan.
- F4E4 L2 Line Voltage Error – Indicates low L2 voltage (less than 50 V) is detected at the CCU.
- Check to see if a household fuse has blown or a circuit breaker.
- Confirm the power cord is properly installed and plugged in.
- Unplug dryer or disconnect power and check the relay.
Gas Models Only: Unplug dryer or disconnect power and check the P14 connection on the CCU. (Harness loopback on Pins 4 & 5).
- F6E1 Communication error – UI to CCU – Communication between the CCU and UI has not been detected. If all connections are good, including the harness, replace the user interface (UI).
- F6E2 Communication error – CCU to UI – Communication between the UI and CCU has not been detected. If all connections are good, including the harness, replace the CCU.
Two Common Issues with the Duet Dryer
- The idler pulley will let off a squeal that will run you out of the house, unless of course you have a new idler pulley on the shelf, you won’t have to put up with it for long. You can replace this part in about 20 minutes if you know exactly how to get to everything. If you need help with this, Neli is standing by to give you a hand.
The idler assembly is #39 in the breakdown below:
2. The user interface skin begins to break down and cracks. The cracks sometimes prevent you from pressing the button switch and either applying power or starting the dryer. If yours is already doing this but is still functional, I’ve seen people use clear shipping tape applied carefully to prevent wrinkles over the bad parts. It works as long as the button switches are affected. The other route is a full replacement. The UI is #9 in the breakdown below:
Looks like another trip down DIY appliance repair discovery lane is rapidly coming to an end for today. There will be more, so don’t despair. As always, we hope our series designed to help out our fellow DIYers is working for you. And don’t forget, you can always book an appointment with Neli to get the answers you need for those appliance repair issues that always come up at the worst possible time!
Till next time.
Thomas @ Neli
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