How to Fix Maytag Dryer Error d9

Error Code: Dryer Difficulty: Moderate

Problem: Diagnostic code: Low voltage detected at control board power supply

How to Fix Dryer Error

1. Disconnect power and remove rear panel to access power cord terminal block.
2. Restore power and measure voltage at terminal block: L1-Neutral=120V, L2-Neutral=120V, L1-L2=240V. Voltage below 105V on either leg triggers d
3. If household voltage low, contact utility company—may indicate neighborhood transformer issue.
4. If voltage correct at terminal block but d9 persists, test voltage at control board power supply input terminals.
5. Inspect control board WPW10111608 for failed filter capacitors on power supply section—bulging/leaking tops indicate failure.
6. Test power supply output voltages if schematic available (typically 5VDC and 12VDC rails)—out of spec indicates board failure.
7. Control board cannot be economically repaired—replace WPW10111608 assembly.
8. Before replacement, verify no short circuits exist downstream that could damage new board: test heating element for ground faults, motor windings for shorts.
9. After installation, measure control board supply voltages to confirm proper operation.
10. Run diagnostic cycle to verify all functions operate correctly at proper voltage levels.

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