Maytag Dishwasher PDC Leaking — How to Diagnose & Fix a Water-Damaged Control Board
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Understanding the Problem
When water reaches the PDC (printed circuit/control board) area of a Maytag dishwasher it can short components, corrode traces, or cause intermittent operation and error codes. Symptoms range from flashing LEDs and non-responsive controls to complete failure where the dishwasher won’t start. The PDC is usually mounted behind the control console or kick plate area and is vulnerable when leaks run down the door or along wiring harnesses. A wet control board is often a symptom of another problem — a door gasket failure, cracked tub, loose hose clamp, failed pump seal, or an overfilling condition. Simply drying the board may give a temporary fix, but corrosion or hidden shorts typically require board replacement and correction of the original leak source to prevent recurrence.
Common Symptoms
Dishwasher won’t start or stops mid-cycle, flashing or strobing lights and error codes, control buttons unresponsive, occasional shorting or odd behavior after running a cycle, visible corrosion or water droplets near the control board.
Common Causes
- Failed door gasket/boot allowing wash water to escape and run down into the console
- Cracked tub or leaking pump seal that sprays or drips along internal components
- Loose/failed hose connection, overflowing/filling problems, or misrouted wiring harness that channels water to the PDC
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Helpful Repair Tip
To confirm water reached the PDC, cut power, remove the access panel or control console, and inspect the board for water residue, white/green corrosion, or burned traces. Place a dry paper towel under the board and run a short cycle (with power reconnected) while watching for fresh moisture to pinpoint the leak path.
Frequently Asked Questions
Can I just dry the control board and keep using the dishwasher?
Drying can work temporarily if there is no corrosion or burned traces, but it's not a guaranteed long-term fix. Once moisture has contacted the PCB, corrosion or weakened solder joints can cause repeat faults. Best practice: disconnect power, inspect for corrosion, clean with isopropyl alcohol if minor, and replace the control board if any damage is visible. Also find and fix the leak source before reinstallation.
How do I find where the water is coming from?
Run a short cycle while watching inside and under the dishwasher (place towels and a pan under the unit). Check common leak points: door gasket and door hinge area, pump seals at the base, hose connections (fill, drain, circulation), and the tub for cracks. Inspect the wiring harness routing — sometimes a loose clamp or misrouted hose channels water toward the control. Tighten clamps, replace failed seals/gaskets, and level the dishwasher to prevent future leaks.
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