Dishwasher leaks damage flooring and cabinetry fast. Here is how to narrow down where the water is coming from.
Because a dishwasher sits under a counter, a slow leak can soak the subfloor and the cabinet base long before you see water on the kitchen tile. Finding the source early matters more here than with almost any other appliance.
Leaking from the door
Water running down the front usually means the door gasket is hardened, torn or dirty, or the door is out of alignment. Wipe the gasket clean, check for splits, and confirm the machine is level — a dishwasher tipped forward will leak from the door even with a perfect seal.
Leaking from underneath
- The water inlet valve, which often weeps rather than gushes.
- The drain hose connection at the pump or the sink.
- A cracked sump or a failed pump seal.
- The heating element gasket where it passes through the tub.
Leaking only sometimes
Intermittent leaks usually mean oversudsing. Regular dish soap in a dishwasher, or far too much detergent, produces foam that forces water past the door seal. Run a rinse cycle with a tablespoon of vegetable oil to break the suds, and switch to proper dishwasher detergent.
“Lay a dry paper towel along the base and run a cycle. Where it darkens first is where to look.”
If you find water in the cabinet base, stop using the machine until it is repaired. Swollen particleboard and mould are far more expensive than the pump seal that caused them.