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Error code reference

Fisher & Paykel Dishwasher Error Code E7

Detergent diverter fault

Fisher & Paykel codesFisher & Paykel dishwasher codes

Detergent diverter fault – under current (sub code 02) or over current (sub code 03).

First step from the service manual

Check the harness connections at the detergent diverter and controller for signs of water damage, corrosion or arcing.

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

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What E7 means on a Fisher & Paykel dishwasher

The E7 error code on a Fisher & Paykel dishwasher indicates a fault with the detergent diverter, a motorized component responsible for directing detergent from the dispenser into the wash system at the correct point in the cycle. Sub code 02 identifies an under-current condition, meaning the controller is detecting less current draw than expected from the diverter motor, which typically points to an open circuit, a failed motor winding, or a broken wire in the harness. Sub code 03 identifies an over-current condition, where the motor is drawing excessive current, which usually indicates a mechanical obstruction, a seized or binding motor, or a short circuit within the motor or wiring.

The detergent diverter relies on a low-voltage circuit running between the main controller and the diverter motor assembly. Any interruption or abnormal resistance along this circuit will cause the controller to log an E7 fault. Water intrusion into the connector housings is a particularly common trigger because it can cause corrosion that increases circuit resistance, leading to under-current readings, or it can create conductive bridges between terminals, leading to over-current or arcing conditions.

The first diagnostic step is a thorough inspection of the wiring harness connectors at both the detergent diverter and the controller board. Look specifically for corrosion on the terminals, evidence of arcing such as burn marks or melted plastic, and any physical damage to the wire insulation. If the connectors check out clean and intact, the diverter motor itself should be tested for correct resistance and mechanical freedom of movement.

Source: manufacturer service documentation.

Common causes of E7

  1. 01

    Corroded or water-damaged wiring connectors

    Wiring / connection

    Water intrusion at the harness connectors near the detergent diverter or controller board causes corrosion or conductive bridging between terminals, disrupting the current signal. Inspect the connector pins closely for green or white oxidation, burn marks, or melted plastic.

  2. 02

    Failed detergent diverter motor

    Part replacement

    The diverter motor winding can fail open (causing under-current, sub code 02) or develop an internal short (causing over-current, sub code 03). If the harness checks out clean, the motor itself should be tested for correct resistance values and replaced if outside specification.

  3. 03

    Broken or damaged wiring in the harness

    Wiring / connection

    A wire in the circuit between the controller and the detergent diverter can fracture internally due to repeated movement during cycles, producing an intermittent or complete open circuit. Flex the harness while monitoring continuity to locate a break.

  4. 04

    Mechanical obstruction in the diverter assembly

    Wiring / connection

    A seized or mechanically bound diverter motor will cause the motor to draw excessive current, triggering sub code 03. Check whether the diverter mechanism moves freely by hand and clear any detergent buildup or debris that could restrict it.

  5. 05

    Faulty controller board

    Part replacement

    If the harness, connectors, and diverter motor all test within normal parameters, the controller board itself may be misreading the current signal or unable to drive the circuit correctly. Board replacement is typically a last resort after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about E7

What does E7 mean on a Fisher & Paykel dishwasher?
E7 indicates a detergent diverter fault. The dishwasher's controller has detected an abnormal current reading from the detergent diverter motor, either too low (sub code 02) or too high (sub code 03). This component is responsible for releasing detergent at the correct stage of the wash cycle, and the fault means it is not operating within expected electrical parameters.
Can I fix the E7 error myself, or do I need a technician?
Some causes of E7 are DIY-accessible. Inspecting the wiring harness connectors for corrosion, cleaning corroded terminals, and checking for physical obstructions in the diverter assembly can be done without specialized tools. However, testing motor resistance, tracing a broken wire inside a harness, or replacing the controller board typically requires electrical testing equipment and comfort working with appliance wiring, so those steps are better handled by a qualified technician.
Is it safe to keep using my dishwasher when E7 is displayed?
An E7 fault related to over-current (sub code 03) or evidence of arcing in the wiring means you should stop using the dishwasher until the issue is resolved, as damaged or shorted wiring is a potential safety concern. Under-current faults (sub code 02) are less immediately dangerous but will likely prevent detergent from dispensing correctly, resulting in poor wash performance. In either case, resolving the fault before continued use is strongly recommended.
How much does it cost to repair an E7 error on a Fisher & Paykel dishwasher?
Repair costs vary depending on the root cause. Cleaning corroded connectors involves minimal expense, while replacing the detergent diverter motor typically costs in the range of $80 to $200 for parts plus labor. A controller board replacement is the most expensive outcome, often ranging from $200 to $450 or more including installation. Getting a technician diagnosis first helps narrow down which component actually needs replacement.
Will resetting the dishwasher clear the E7 error?
A reset may temporarily clear the E7 code, but if the underlying fault with the detergent diverter or its wiring has not been corrected, the error will return during the next cycle when the controller attempts to operate the diverter motor. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. The harness connections and motor should be inspected and tested to resolve the issue permanently.

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