Dishwasher leaking from the bottom? 6 fixes (Whirlpool, Bosch, GE, Samsung, LG)

If your dishwasher is leaking water onto the floor, the source is almost always one of six things: a worn door gasket, a clogged or split drain hose, a stuck float, a failed water inlet valve, a cracked tub or pump housing, or simple overloading with the wrong detergent. Five of the six you can fix yourself in under an hour with basic tools. Below is the diagnosis order, easiest first.

Find the leak source first

Where the water shows up tells you a lot about what's broken:

• Leak from the front of the door: door gasket worn, door not latching square, or wrong detergent (over-sudsing)
• Leak from underneath, front: tub float stuck, inlet valve dripping, or door gasket on the bottom edge
• Leak from underneath, rear: drain hose split or clamp loose, drain pump leaking, or main tub cracked
• Leak only during the fill step: water inlet valve stuck open or supply line connection loose
• Leak only during the drain step: drain hose, drain pump, or air gap blockage
• Leak that smells soapy and foamy: wrong detergent type, see fix 6 below

Run a half cycle with the kick plate off and a flashlight aimed at the bottom. The leak will reveal itself within 5 minutes.

1. Check the door gasket

The door gasket is the rubber seal around the dishwasher door opening. After 5-10 years of heat and detergent it gets stiff, cracked, or torn. The most common signs: water on the floor in front of the dishwasher, or visible cracks when you pull the gasket back with your fingers. Test: with the dishwasher empty, run a Normal cycle. After 10 minutes, watch the door edges for water. If water beads at the bottom corners, the gasket is shot. Replacement is a 15-20 minute job. Gaskets snap into a channel around the door opening. Pull the old one out, clean the channel, press the new one in starting from a top corner. Gaskets run $30-60 depending on brand.

2. Check the drain hose

The drain hose runs from the dishwasher pump up to the air gap or sink disposal. Splits, cracks, or loose clamps at either end leak under the floor. Pull the kick plate off and trace the hose. Look for water staining along its length, swollen sections, or loose hose clamps. The clamp at the disposal end is the most common failure point because it gets bumped when people work under the sink. Tighten loose clamps with pliers. Replace cracked sections of hose with the right diameter (most are 5/8 or 7/8 inch). A full new hose runs $15-25.

3. Verify the float switch isn't stuck

Inside the tub at the front-left or front-right corner there's a small plastic dome (the float). It rises with water level. If it rises high enough, it triggers a switch that shuts off the inlet valve. When the float gets stuck (debris, soap scum, or a bent cup) the dishwasher keeps filling and overflows. Pull the float up and down by hand. It should move freely with a small click. If it sticks or feels gritty, lift it out, rinse it under the sink, clean the cup, and reseat.

4. Test the water inlet valve

The inlet valve is the electrical valve that opens to let water into the tub during fill. When it fails open (mechanically stuck), water keeps flowing even after the cycle ends, and the dishwasher overflows. Symptoms: leak only during or right after the fill step. Inlet valve also makes a constant humming or trickling sound when the dishwasher is OFF. Test: with the dishwasher off and unplugged, check if water is still entering the tub from the inlet. If yes, valve is failed. Replace it. Valves run $30-60, accessed from the front lower-left after removing the kick plate and front panel.

5. Inspect the drain pump and tub for cracks

This is the rare one but it does happen. The plastic tub or the drain pump housing can develop a hairline crack from years of heat cycling. Once cracked, water seeps every cycle. Pull the kick plate off and watch the pump area during a wash cycle. A cracked pump housing usually shows a clear stream of water. A cracked tub leaks slower but consistently. Pump replacement is $80-150 plus install. A cracked tub means the dishwasher is done. On any machine more than 8 years old, replacement is usually the better call.

6. Check what you put in

Sometimes the leak isn't a hardware problem. Wrong detergent (regular dish soap instead of dishwasher detergent) creates massive suds that overflow past the door seal even if the seal is fine. Overloading with too many dishes can also block the spray arms from rotating, causing water to escape upward past the gasket. If the leak smells soapy and you see foam under the kick plate, this is the cause. Run an empty cycle with no detergent to flush, then use ONLY dishwasher-rated detergent (gel, powder, or pods labeled for dishwashers).

Brand specific notes

Whirlpool, KitchenAid, Maytag, JennAir. Same dishwasher platform. Door gaskets snap into a single piece around the perimeter. Drain hose attaches to the disposal with a 7/8 clamp. The float is front-left on most models. Bosch and Bosch family (Thermador, Gaggenau). European design with two-piece door gasket (door perimeter + bottom). Leaks often come from the bottom strip which is replaced separately. Bosch also has a "leak detector" tray at the base that disables the dishwasher if it senses water, so a small leak can cause a no-start condition. GE and GE Profile. Standard one-piece gasket. GE drain hoses are known to develop pinhole leaks midway, so inspect the full length, not just the clamps. Frigidaire and Electrolux. Inlet valve is the most common failure on this platform, check it first. Samsung and LG. Tend to have integrated leak sensors that trigger an error code (LE on LG, LC on Samsung) before the leak is visible. If you see one of those codes, water has reached the base pan. Pull the kick plate and look immediately.

Frequently asked questions

Why is my dishwasher leaking water onto the floor? 6 likely causes: door gasket, drain hose, stuck float, failed inlet valve, cracked tub or pump, or wrong detergent. Find the leak location first (front vs bottom-front vs bottom-rear) to narrow it down. Can a clogged dishwasher cause a leak? Yes. A clogged filter or spray arm forces water to back up and find another exit, often through the door gasket. See how often to clean a dishwasher filter. Is it safe to use the dishwasher if it's leaking? No. Even a small leak can warp wood floors or rot subfloor in weeks. Shut off the water valve under the sink and either fix it or hand wash until you do. Why is my dishwasher leaking only sometimes? Intermittent leaks usually point to a door gasket that's worn in one spot, or a float that sticks occasionally. Run a cycle with a flashlight aimed at the suspected area to confirm. How much does a dishwasher leak repair cost? DIY: $30-60 for a gasket, $80-150 for a pump. Service call: $150-300 for diagnosis plus parts. For a dishwasher more than 8 years old with a major leak, replacement is often cheaper than repair. Why does my dishwasher leak only when the dishwasher next to it runs? Shared drain line. If your dishwasher and washing machine share a drain, a backed up washing machine drain can push water into the dishwasher tub and out the gasket. Clear the shared drain. If u also have a draining issue see why is my dishwasher not draining water. If the door latch is part of the problem see dishwasher door latch broken, how to replace.