Fisher & Paykel Dishwasher Error Code E7

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.

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.

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.

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.

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.