Whirlpool Dishwasher Error Code 10-3

Code 10-3 means the control board has detected a problem in the drying fan circuit, specifically a loose connection or an open (failed) drying fan motor. The board monitors electrical resistance in this circuit, and when it sees no continuity or an out-of-range reading, it sets the 10-3 fault. The drying fan will not operate until the fault is resolved.

The dishwasher will likely still wash dishes, but the drying phase will not function correctly with code 10-3 active, and depending on how the control board responds to the fault, the cycle may stop or fail to complete. Running the dishwasher in this condition is not dangerous, but you will get poor drying results. Addressing the fault promptly is advisable to prevent any secondary issues from prolonged fan motor failure.

Disconnect power to the dishwasher first. Access the drying fan motor and disconnect its wiring connector. Set a multimeter to measure resistance (ohms) and probe the two motor terminals. A functional motor will show a finite resistance reading, typically in the range of a few ohms to a few hundred ohms depending on the motor type. An open motor will read OL or infinite resistance, confirming it needs replacement. Also probe each wire in the connector for continuity back through the harness to rule out a broken wire as the source of the 10-3 fault.

Start by unplugging the dishwasher or shutting off the circuit breaker. Locate the drying fan and use a multimeter to test the resistance across the fan motor terminals. If you get an infinite resistance reading, the motor is open and needs to be replaced. If the motor tests within spec, inspect every connector in the fan circuit for looseness, corrosion, or damaged wires, and repair or reseat any faulty connections. Restore power and run a cycle to confirm the code is cleared.

If the problem is only a loose or corroded connector, the repair costs nothing beyond your time. A replacement drying fan motor for a Whirlpool dishwasher typically runs between $20 and $60 for the part depending on the model. If you hire a technician, expect to pay an additional $75 to $150 in labor. This is a moderately accessible repair for a confident DIYer since the fan assembly is generally reachable after removing the dishwasher's inner door panel or lower access panel.