Replace the filter cap, tighten securely. Reattach the drain hose. Close the access panel. Plug the machine back in, turn water on. Run a short “Rinse & Spin” cycle to check for leaks and proper draining.
Most front-load machines have a small access door at the bottom front. This filter catches coins, hair, and lint before they reach the pump. YouTube·GoCleanCo How to Clean a Washing Machine Filter how to clean drain in washing machine
If the machine drains but water backs up onto the floor, the clog is likely in your home's plumbing (the standpipe), not the machine. Replace the filter cap, tighten securely