Jenn-Air Dishwasher Error Code E:31

The E:31 error code on a Jenn-Air dishwasher indicates an undervoltage condition, meaning the appliance is detecting supply voltage in the range of approximately 170V to 195V rather than the standard 120V nominal (or 240V for certain configurations) within acceptable tolerance. When this condition is detected, the control board halts operation in whatever stage the cycle was currently running, leaving the dishwasher completely non-functional until the voltage issue is resolved. Because the appliance stops mid-cycle, any rinsing or drying that was in progress may be incomplete, resulting in unsatisfactory cleaning results.

Importantly, the first diagnostic step for E:31 is classified as "no appliance fault," meaning the dishwasher itself is not defective. The problem originates outside the unit, in the household electrical supply. Low voltage reaching the appliance is the root cause, and the dishwasher's control system is simply responding correctly to a condition it detects as outside safe operating parameters. This distinction is critical before ordering parts or disassembling the unit.

Common sources of undervoltage include a weak or failing utility supply, an overloaded circuit, a deteriorating neutral connection in the home's electrical panel, or a loose wiring connection at the outlet, junction box, or terminal block. Voltage sags caused by high-demand appliances running simultaneously on shared circuits can also trigger this code intermittently. A technician should measure actual line voltage at the dishwasher's supply point under load conditions to confirm the cause.