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Error code reference

Frigidaire Dishwasher Error Code i42

Calibration invalid

Frigidaire codesFrigidaire dishwasher codes
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What the i42 error code actually means

Your Frigidaire dishwasher ran a self-check at startup and got a confusing or unstable reading from the sensor that monitors water level inside the machine. The dishwasher could not set its baseline water level measurement, so it stopped and displayed this error. This usually points to a loose wire connection, a damaged sensor, or leftover water in the bottom of the tub.

Diagnostic procedure

The full i42 procedure

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First diagnostic step
Check sensor wire harness and connection to PCB
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Most common causes of i42

Ranked by how often they cause this code
  1. 1Loose or corroded wire harness connection
  2. 2Damaged or broken wire harness
  3. 3Faulty pressure sensor
  4. 4Residual water or debris in the sump
  5. 5Defective PCB

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Questions people ask about i42

What does i42 mean on a Frigidaire dishwasher?
The i42 code means the dishwasher failed its startup calibration for the water level pressure sensor. The control board sampled the sensor signal while the sump should be empty and found the reading too noisy or outside the expected range. This prevents the dishwasher from operating until the issue is resolved.
Will resetting my Frigidaire dishwasher clear the i42 error?
A reset may temporarily clear the code, but if the underlying wiring or sensor problem is not corrected, the i42 error will return during the next startup calibration cycle. A reset is useful for confirming whether the fault is intermittent, but it is not a repair solution.
How much does it cost to repair a Frigidaire dishwasher showing error code i42?
If only the wire harness needs reseating or cleaning, the repair may cost nothing beyond your time. A replacement pressure sensor typically runs in the range of $20 to $60 for the part. If the PCB is the root cause, board replacement costs generally range from $100 to $250 or more depending on the model, plus any labor charges if a technician is involved.
How do I fix the i42 error on my Frigidaire dishwasher?
Start by inspecting the wire harness that connects the pressure sensor to the PCB, checking for loose pins, corrosion, or visible damage. Reseat both connectors securely and ensure the sump is fully drained before restarting. If the error returns, test the pressure sensor itself and replace it if its output is unstable or out of spec.
Is it safe to use my Frigidaire dishwasher when i42 is displayed?
The dishwasher will typically halt operation when i42 is active because it cannot confirm proper water level monitoring. Running the unit without a functioning pressure sensor risks overfilling or incorrect water management. It is best to resolve the fault before running a wash cycle.

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