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Error code reference

Maytag Dryer Error Code 28

Rotary Switch 3 left of encoder failed at startup.

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Rotary Switch 3 left of encoder failed at startup.

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What 28 means on a Maytag dryer

Error code 28 on a Maytag dryer indicates that the control board detected a failure in Rotary Switch 3, which is the third switch position to the left of the encoder, during the startup sequence. The encoder assembly is part of the user interface control, and the rotary switches work in conjunction with it to register cycle and option selections. When the board runs its startup self-check and fails to receive a valid signal from Rotary Switch 3, it throws code 28 and halts normal operation before a cycle can begin.

For a homeowner, this means the dryer's main control panel is having trouble reading one of the physical selector switches, likely the one that corresponds to a specific drying option or cycle setting. The problem typically lives inside the control console rather than in the drum, motor, or heating system. The dryer is detecting this issue before it even starts, which is why you cannot get a cycle going. The rotary switch itself, its wiring connections to the control board, or the control board receiving the signal are the components most likely involved in this fault.

Source: manufacturer service documentation.

Common causes of 28

  1. 01

    Failed Rotary Switch 3 (mechanical or electrical failure)

    Part replacement

    The rotary switch itself may have worn contacts, a broken detent mechanism, or an internal short or open circuit. Because the failure is detected at startup, the switch is not sending the expected signal to the control board when the dryer powers on.

  2. 02

    Loose or damaged wiring between Rotary Switch 3 and the control board

    Wiring / connection

    A connector that has backed out, a pinched wire, or a broken solder joint on the harness running from Rotary Switch 3 to the main control board can prevent the signal from reaching the board. This can mimic a failed switch without the switch itself being defective.

  3. 03

    Faulty encoder assembly

    Part replacement

    The rotary switches work alongside the encoder, and if the encoder assembly is damaged or misaligned, it can affect the readings of adjacent switches including Rotary Switch 3. A failed encoder may cause the control board to misread switch positions at startup.

  4. 04

    Defective user interface control board

    Part replacement

    If the board itself has a failed input circuit on the Rotary Switch 3 channel, it will log code 28 even when the switch and wiring are intact. This is less common than a failed switch but should be considered after the switch and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about 28

What does error code 28 mean on a Maytag dryer?
Error code 28 means the control board detected a failure in Rotary Switch 3, the third switch position to the left of the encoder, during its startup self-check. The dryer runs this check when it powers on, and if Rotary Switch 3 does not respond correctly, the board logs code 28 and prevents the dryer from starting a cycle. The fault is located in the control console area rather than in the motor or heating system.
How do I fix error code 28 on a Maytag dryer?
Start by unplugging the dryer and opening the control console to inspect the wiring harness connected to Rotary Switch 3 and the encoder assembly. Check for loose connectors, damaged wires, or obvious corrosion. If the wiring looks intact, the rotary switch itself should be tested for continuity in each position using a multimeter. A switch that reads open or shorted when it should not needs to be replaced. If the switch and wiring test normal, the user interface control board is the next component to suspect.
Can I still use my Maytag dryer when error code 28 is showing?
No. Code 28 is detected at startup and prevents the dryer from beginning any cycle. The control board is blocking operation because it cannot confirm the status of Rotary Switch 3. Running loads through the dryer is not possible until the fault is cleared, which requires repairing or replacing the faulty component.
How much does it cost to fix error code 28 on a Maytag dryer?
If the problem is a loose wiring connection, the fix costs nothing beyond your time. A replacement rotary switch typically runs between $15 and $50 depending on the model. A full encoder assembly or user interface control board can range from $60 to $200 or more for parts. Adding a technician's labor rate of $80 to $150 per hour, total repair costs could reach $150 to $350 if a board replacement is needed. Diagnosing the root cause before ordering parts is the best way to avoid unnecessary expenses.
Is error code 28 on a Maytag dryer hard to diagnose yourself?
The diagnosis requires basic disassembly of the control console and the ability to use a multimeter to test switch continuity. For someone comfortable with appliance repair, this is a manageable task. The components are accessible once the console is open, and the rotary switch can be tested in each position to confirm whether it is functioning. If electrical testing is outside your comfort level or the control board appears to be the source, a qualified appliance technician can confirm the diagnosis quickly.

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