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Error code reference

GE Dishwasher Error Code PrF

Pressure sensor failure

GE codesGE dishwasher codes

Pressure sensor failure — signal is undetectable or irrational, causing the cycle to be cancelled.

First step from the service manual

Verify pressure sensor harness, then replace the pressure sensor if needed.

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

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What PrF means on a GE dishwasher

The PrF error code on a GE dishwasher indicates a pressure sensor failure. The pressure sensor monitors water level inside the tub by detecting changes in air pressure within a sealed chamber connected to the sump area. When the control board receives a signal from the pressure sensor that is either completely absent or outside an expected rational range, it interprets this as a sensor fault and cancels the active wash cycle to prevent potential overfill or dry-run pump damage.

The most common entry point for diagnosing PrF is the wiring harness connected to the pressure sensor. A loose connector, corroded terminal, or pinched wire can interrupt the signal path entirely, producing a reading the control board flags as undetectable. If the harness checks out visually and electrically, the sensor itself is likely faulty, either due to a failed internal diaphragm, a blocked pressure port, or a failed electronic element within the sensor body.

Because the pressure sensor is directly responsible for telling the control board when the tub has reached the correct water level, a failure here causes the cycle to abort rather than risk running with incorrect water volume. Technicians should inspect the harness first for continuity and secure seating at both the sensor end and the control board connector before condemning the sensor itself and ordering a replacement.

Source: manufacturer service documentation.

Common causes of PrF

  1. 01

    Loose or disconnected pressure sensor harness

    Wiring / connection

    The wiring connector at the pressure sensor or at the control board may have worked loose, cutting off the signal entirely. Inspect both ends of the harness for secure seating and check for any spread or corroded terminals.

  2. 02

    Failed pressure sensor

    Part replacement

    The sensor itself may have an internal failure in its diaphragm or electronic element, producing a signal the control board reads as irrational or absent. If the harness tests good, replacing the pressure sensor is the next step.

  3. 03

    Damaged or pinched wiring

    Wiring / connection

    A wire in the pressure sensor circuit may be pinched, chafed, or broken, which can cause an intermittent or completely missing signal. Tracing the harness along its full routing will reveal physical damage.

  4. 04

    Blocked pressure port or air chamber

    Wiring / connection

    The small port or tube connecting the air pressure chamber to the sensor can become clogged with debris or mineral deposits, preventing the sensor from reading tub water levels accurately. Cleaning the port may restore normal sensor function.

  5. 05

    Faulty control board

    Part replacement

    If the pressure sensor and its entire wiring harness test correctly, a damaged control board input circuit could be misreading or failing to read the sensor signal. This is the least common cause and should only be considered after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about PrF

What does PrF mean on a GE dishwasher?
PrF stands for pressure sensor failure on a GE dishwasher. It means the control board is receiving a signal from the water-level pressure sensor that is either undetectable or outside a rational range. When this happens, the dishwasher cancels the current cycle to avoid running with an unknown water level. The fault points to either a wiring issue in the sensor harness or a failed pressure sensor.
Can I fix a PrF error on my GE dishwasher myself?
In many cases, yes. Start by inspecting the pressure sensor wiring harness for loose connectors or visible wire damage, since a disconnected or corroded connector is a common cause. If the harness appears intact and properly seated, the pressure sensor itself likely needs to be replaced. Replacing the sensor is a straightforward repair for someone comfortable working with appliance wiring and basic hand tools.
Will resetting my GE dishwasher clear the PrF error code?
A reset may temporarily clear the PrF code, but it will return if the underlying fault is not corrected. The dishwasher's control board generates this code in response to an actual sensor signal problem, so clearing it without fixing the harness or sensor will result in the cycle being cancelled again. A reset is useful for confirming whether the error is intermittent, but it is not a repair.
Is it safe to use my GE dishwasher when a PrF code is displayed?
It is not recommended to continue using the dishwasher while the PrF code is active. The pressure sensor is responsible for monitoring water level, and without reliable data from that sensor, the control board cannot verify that the tub has filled correctly. Running the dishwasher in this condition risks running the wash pump dry or allowing an overfill condition, both of which can cause further damage.
How much does it cost to repair a PrF error on a GE dishwasher?
If only the wiring harness needs to be reseated or cleaned, the repair may cost nothing beyond your time. If the pressure sensor requires replacement, parts typically range from $20 to $60 depending on the specific model. If you hire a technician, total repair costs including labor generally fall in the range of $100 to $200. Control board replacement, which is rarely needed for this code, would be significantly more expensive.

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