GE Dryer Error Code 4

Error code 4 on a GE dryer indicates a lid switch failure. The lid switch is a safety component that signals to the control board whether the dryer door or lid is open or closed. When this switch fails or sends an unexpected signal, the control board registers fault code 4 and will typically prevent the dryer from operating. The switch is part of the dryer's interlock system, designed to stop the drum from spinning when the door is open.

The failure can originate from several points in the lid switch circuit. The switch itself may have worn contacts that no longer make a reliable connection, the wiring harness between the switch and control board may be damaged or have a loose connector, or the switch actuator tab on the door may be broken and no longer physically activating the switch. Because the control board interprets the switch signal, a faulty board can also produce this code even when the switch itself is functioning correctly.

The first recommended diagnostic step is control board replacement, which suggests the board's input circuit for the lid switch signal may be the more common point of failure in this design. However, a thorough diagnosis should include checking the switch continuity with a multimeter and inspecting the wiring harness before committing to a board replacement. Confirming whether the switch itself is opening and closing correctly can help isolate the fault before replacing the more expensive control board.