Maytag Dryer Error Code 28

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.

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.

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.

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.

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.