GE Dryer Error Code 18

Error code 18 on a GE dryer indicates that the Drain Pump Clearing algorithm has failed. During the drain cycle, the control monitors a pressure sensor to confirm the water level is dropping. If the pressure sensor does not register an empty drum or tub condition before the maximum allowable continuous drain ON time is reached, the control aborts the drain process and triggers this fault. The error points to a failure somewhere in the drain system, the pressure sensing circuit, or both.

The drain pump itself is the most common hardware culprit. A blocked pump impeller, a kinked or obstructed drain hose, or an improperly installed standpipe can all prevent adequate water removal within the allotted time. Standpipe height is a specific concern: if the standpipe is too tall, the pump works against excessive head pressure and may not clear the water fast enough. The pump resistance should measure approximately 13.5 ohms when tested across the J512 connector on the control board. A reading that is open, shorted, or significantly outside that value points to a failed pump motor winding.

The pressure sensor is the other side of this fault. Even if the pump is functioning correctly, a pressure sensor that reads a false water-present signal will cause the control to believe draining has not completed. Verify the sensor and its hose or port for blockages, moisture, or damage. If both the pump resistance and the pressure sensor check out, the control board itself may be misreading the sensor signal, though this is a less common cause.