GE Dishwasher Error Code F33

F33 means the control board has detected a low reading from the pressure sensor, which monitors water level inside the tub. The dishwasher stops operation because it cannot verify that the correct amount of water is present. The cause is typically a disconnected wiring harness on the pressure sensor or a failed sensor.

Running the dishwasher with an active F33 code is not advisable. The dishwasher cannot accurately monitor the water level in the tub, which means the pump could run dry or the cycle may not complete correctly. Resolve the pressure sensor issue before resuming regular use.

The pressure sensor on most GE dishwashers is located on the lower section of the tub or along the side of the outer cabinet, connected by a small hose to the tub and a wiring harness to the control circuit. You will typically need to remove the lower panel or pull the unit partially out from the cabinet to access it. Consult the wiring diagram on your specific model's service sheet, usually found on the door frame, for the exact location.

Start by pulling the dishwasher out enough to access the pressure sensor and check whether its wiring harness connector is fully seated. Press the connector firmly until it clicks into place, then run a cycle to see if F33 clears. If the harness is connected and the error persists, the pressure sensor itself needs to be replaced. A technician can confirm a failed sensor with a multimeter before ordering parts.

If the fix is simply reconnecting a loose wiring harness, there is no parts cost. A replacement GE pressure sensor typically costs between $20 and $60 for the part. If you hire a technician, expect to add $75 to $150 in labor, though the total varies by region and service provider. This is a relatively accessible repair for a confident DIYer who is comfortable disconnecting and reconnecting appliance wiring.