Drain pump & coin trap — F9 E1 / long drain
The single most common Whirlpool washer call. F9 E1 on Duet and current front-load WFW units, or 'won't drain' on Cabrio and WTW top-load units. Usually a coin / sock / bra-wire blocking the pump impeller, but the pump motor itself fails open often enough that we replace it instead of just cleaning when the impeller shows wear. OEM W10730972 / WPW10730972 pumps on every truck.