Error code reference

Frigidaire Dishwasher Error Code E:28

Aqua sensor not properly calibrated; aqua sensor doesn't run during wash cycle.

Aqua sensor not properly calibrated; aqua sensor doesn't run during wash cycle.

First step from the service manual

Check continuity between aqua sensor (b5) and power module. Make sure aqua sensor is clean where it enters the sump.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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E:28 on my Frigidaire Dishwasher

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Aqua sensor not properly calibrated

From Service Manual 155819, p.31:

1.Check continuity between aqua sensor (b5) and power module. Make sure aqua sensor is clean where it enters the sump.

2.Measure drain pump winding resistance at connector J7 on the main control. Expected: 12 to 16 ohms at room temperature.

3.Back-probe the pump driver output under load. Verify the board switches the pump at 120 VAC during the drain portion of the cycle.

Part 5304497818

Drain pump

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