Stop the washer, shut off the water supply if the leak is active, and stay clear of water around electrical connections. Then dry the floor so fresh moisture is easier to trace.
If it leaks while filling, inspect the inlet hoses
Look for water at the shutoff valves, hose fittings, and hose surfaces. A leak at the back can run down the cabinet and emerge underneath.
If it leaks while washing, check the door and suds
On front-load machines, debris or damage at the door boot can let water escape. Excess detergent can create foam that leaks from vents or the dispenser area.
If it leaks while draining, follow the drain path
Inspect the accessible drain hose and standpipe. A household drain restriction can overflow even when the washer itself is not leaking internally.
Do not tip or dismantle a water-filled washer
Pumps, clamps, tubs, and internal seals require safe access. If water appears from the center underside while all external connections stay dry, service is the sensible next step.
Do not resume normal use until the source is resolved; even a small repeated leak can damage flooring and electrical components.
Sources
- American Cleaning Institute — Laundry Basics — Laundry loading, detergent use, washer care, and safe laundry practices.