Frigidaire Dishwasher Error Code i45

The i45 code means the dishwasher detected an invalid calibration result because the pressure sensor signal was too low for an empty tub. The control board runs a calibration check to establish a baseline water level reading, and if the pressure signal falls outside the expected range, it stores this fault. The most likely causes are a loose wire harness connection, a blocked pressure sensing tube, or a failed pressure sensor.

A reset may temporarily clear the i45 code, but if the underlying fault with the pressure sensor, wiring, or sensing tube remains, the code will return when the dishwasher attempts calibration again. Resetting alone is not a fix and should only be done after addressing the root cause to confirm the repair was successful.

Repair costs depend on the failed component. A replacement pressure sensor typically costs between $20 and $60 for the part alone, while a new PCB can range from $80 to $200 or more depending on the model. Adding professional labor, total repair costs can range from $100 to $350 or higher, making it worth diagnosing the exact cause before purchasing parts.

Some causes of i45 are DIY-friendly, such as reseating a loose wire harness connector or inspecting and clearing a blocked pressure tube. If those steps do not resolve the code, testing the pressure sensor and wiring with a multimeter is the next step. Replacing the pressure sensor is a moderate repair, while PCB replacement is more involved and may benefit from professional service.

Running the dishwasher with an active i45 code is not recommended. Because the pressure calibration has failed, the control board cannot accurately track water levels during the wash cycle. This could result in overfilling or underfilling, which may lead to leaks or poor wash performance.