Drained water can siphon back into the washer if the drain hose extends too far. Ensure the drain hose does not extend more than 4.5" (113 mm) into the drainpipe or laundry tub. Using the U-shape drain hose form (as described in the Installation Instructions), will provide the correct drain hose length in the drainpipe or laundry tub.. Ensure you have 4.5 inches (11 cm) of clearance in your sink. If your washing machine drains into a sink, use your measuring tape to gauge the distance from the end of the drain hose to the bottom of the sink.
If your Whirlpool washer is displaying an E1 F9 code, it means there is a problem with the drain pump system. Check that the drain hose is not kinked or clogged and ensure the drain pump is functioning properly.. The F9 E1 error code means your Whirlpool washer is taking longer to drain than expected. If you are encountering this problem, this guide will show you what steps.