Kenmore Dryer Error Code F4E4

The F4E4 error code on a Kenmore dryer indicates that the Central Control Unit (CCU) has detected a low voltage condition on the L2 leg of the 240-volt supply circuit, specifically measuring less than 50 volts when the dryer expects to see approximately 120 volts on that leg. Electric dryers in North America require a split-phase 240-volt supply consisting of two 120-volt legs, labeled L1 and L2. The heating element and motor operate across both legs, and the CCU continuously monitors each leg independently. When L2 drops below the 50-volt threshold, the control board logs this fault and may prevent normal operation to protect internal components from running in an undervoltage condition.

The most common cause of this fault is a partially lost power supply at the circuit breaker panel. A double-pole breaker can trip on only one pole, cutting power to L2 while leaving L1 intact. This is a well-known failure mode in older breaker panels and can also result from a blown cartridge fuse in panels that use fuse-based protection. The dryer may appear to have some power, since L1 alone can run the drum motor and controls, but heating will be absent and the F4E4 code will be triggered.

Beyond the panel, the fault can originate at the power cord connection itself. A loose or improperly seated terminal at the dryer's terminal block can cause high resistance on the L2 leg, dropping voltage below the detection threshold. Additionally, the CCU's internal relay connections for line voltage monitoring should be inspected, as a loose or corroded relay connector on the board can produce a false low-voltage reading even when the supply voltage at the terminal block is correct.