Fisher & Paykel Dishwasher Error Code E3

The E3 error code on a Fisher & Paykel dishwasher indicates an over temperature fault, meaning the water temperature inside the appliance has risen above safe operating limits. The dishwasher's control system continuously monitors incoming and internal water temperatures via a thermistor or temperature sensor. When that sensor detects a reading beyond the acceptable threshold, the machine halts the cycle and triggers E3 to prevent potential damage to internal components, dish loads, or the appliance itself.

The most common trigger for this fault is a hot water supply connection that exceeds 60 degrees Celsius. Fisher & Paykel dishwashers are designed to receive cold or warm water and manage heating internally with precision. If the unit is plumbed directly into a hot water line running above 60°C, the incoming water immediately exceeds the safe limit before the machine can regulate it, causing the fault to appear at the start of or early in a cycle.

Beyond the supply temperature issue, a faulty temperature sensor or thermistor that reads incorrectly can cause a false E3 fault even when water temperatures are normal. A malfunctioning heating element that fails to cut off at the correct point is another potential cause, allowing water to overheat during the wash or rinse phase. Diagnosing the root cause requires confirming the inlet water temperature first, then evaluating sensor and heating circuit integrity if the supply temperature is within spec.