You finish a load, open the dishwasher, and find a puddle on the kitchen floor. Or worse, you walk in to a damp baseboard and figure out the dishwasher has been leaking for weeks. Dishwasher leaks are one of the more urgent appliance problems because the damage compounds. A small leak today is a warped cabinet floor next month and a mold remediation bill next year. The good news is that almost all dishwasher leaks trace back to one of five specific causes, and most are repairable.
Here's what we check first when we get a "dishwasher leaking" call in the Orlando area.
Cause 1: Worn or damaged door gasket
The rubber gasket that seals the dishwasher door is the most common leak source we see, especially on units 5+ years old. Over time the rubber dries out, develops cracks at the corners, gets compressed in the same spots from years of door slams, and eventually loses its seal. Water sprays out during the wash cycle and pools at the bottom of the door or runs down onto the floor.
How to identify it: Open the door and run your fingers along the entire gasket. Look for cracks, gummy spots, or sections that look mashed flat. Compare top, sides, and bottom. Gaskets usually fail in spots, not all at once. If you see visible damage anywhere, the gasket needs replacement.
Repair note: Door gaskets are model-specific and vary widely in cost depending on brand. The replacement itself is straightforward. The Florida-humidity factor matters here. Gaskets in Orlando-area dishwashers tend to dry-rot 1-2 years faster than the manufacturer rating.
Cause 2: Cracked or clogged spray arm
The spray arms (one on the bottom, sometimes one mid-tub, sometimes one on the top of the tub) spin during the wash cycle and direct water onto the dishes. If a spray arm cracks, water sprays in directions it shouldn't. Including onto the door seal in ways the gasket isn't designed to handle. This shows up as a leak that happens only during certain wash phases.
How to identify it: Pull out the lower rack, lift the spray arm out (most spin-off counterclockwise or pop off), and inspect for cracks. Also check the spray nozzles for clogs. Orlando's hard water leaves mineral scale that can block individual nozzles, redirecting water force in odd ways.
Repair note: Spray arms are inexpensive parts. Cleaning clogged nozzles with a toothpick is a 5-minute DIY fix. Replacing a cracked spray arm requires identifying the right part for your model.
Cause 3: Failed water inlet valve or cracked supply line
Water enters the dishwasher through an inlet valve at the base. The supply line connects from the under-sink shutoff to that valve. Both can fail and both leak in subtle ways. Slow drips that show up only when the dishwasher is running, or steady seepage that stains the floor under the unit.
How to identify it: Pull the dishwasher out of the cabinet. Look for water staining or active dripping at the inlet valve (front-bottom of the unit) or anywhere along the supply line. A flashlight helps. The supply line is usually braided steel or vinyl; if you see corrosion at the connections or splits in the line, you've found it.
Repair note: Supply line replacement is a 30-minute job for someone comfortable with plumbing. Inlet valve replacement requires more disassembly and is usually a tech call.
Cause 4: Stuck float or failed float switch
Every dishwasher has a float. A small plastic piece that rises with water level and triggers the inlet valve to shut off. If the float gets stuck (usually because of debris or mineral buildup), the dishwasher can overfill and leak out the door, the vent, or wherever water finds an opening.
How to identify it: Pull out the bottom rack and look for the float. It's a small plastic dome usually at the front of the tub, about the size of a golf ball. Push it up and down with your finger. It should move freely. If it sticks at the top or the bottom, that's your problem.
Repair note: Sometimes you can free a stuck float just by cleaning around it. If the underlying float switch (the electrical sensor below it) has failed, that's a deeper repair.
Cause 5: Failed drain pump or pump seal
The drain pump moves dirty water out of the dishwasher at the end of each cycle. If the pump's seal fails, water leaks out underneath the unit during the drain cycle. This kind of leak is hard to spot from above. It happens under the dishwasher, where you don't see it until the leak has been going on for weeks and the cabinet floor is rotting.
How to identify it: Pull the dishwasher out. Look at the bottom of the unit. Active wetness or staining around the drain pump area points to a pump seal failure.
Repair note: Pump replacements are a more involved repair because the pump usually requires the dishwasher to be tipped on its back. We carry the most common drain pumps on our trucks for popular models so it's usually a single-visit fix.
What to do as soon as you notice a leak
- Stop using the dishwasher. Don't run another cycle. Each cycle adds water to whatever damage the leak is causing.
- Turn off the water supply. Reach under the sink, find the valve labeled "dishwasher" or the small valve near the supply line, turn it clockwise until it stops.
- Unplug the dishwasher or kill the breaker. Especially if there's water visible around any electrical components.
- Pull the unit out from the cabinet if you can. Inspect underneath. Note where the water is coming from and how much there is.
- Document the damage with photos. If you end up filing an insurance claim for water damage to floors or cabinets, you'll need this.
- Dry the cabinet floor thoroughly. Mold can start growing within 24-48 hours in Florida humidity.
What dishwasher leak repairs typically cost
Yale Appliance's 2025 service-call data puts dishwasher repairs in the $140-$400 range, with an average around $180. Where a leak repair lands in that range depends on the cause:
- Lower end: Cleaning a clogged spray arm, freeing a stuck float, replacing a supply line
- Middle: Door gasket replacement, water inlet valve replacement
- Higher end: Drain pump replacement, especially on premium brands
The hidden cost is the collateral damage. A dishwasher leak that's been going on for weeks can ruin the cabinet floor underneath, warp adjacent flooring, and create mold issues that cost far more to remediate than the original repair would have.
When repair doesn't make sense
If your dishwasher is over 8 years old (Florida-realistic lifespan is 7-10 years) and it's leaking from multiple sources or has had previous repairs, replacement usually wins. A new mid-tier dishwasher in the Orlando market runs $400-$900 installed. Compare against a $300-$400 repair on a unit at the end of its life.
Common questions
Why is my dishwasher leaking from the bottom only when it runs?
Most likely the door gasket is failing or a spray arm is cracked, redirecting water onto a part of the door not designed to seal. Less commonly, an internal hose has a slow leak that shows up only during the wash cycle.
Can I run my dishwasher with a small leak?
No. Even a small leak compounds quickly. The water under the dishwasher will rot the cabinet, warp the floor, and create mold. Stop using it until the leak is identified and fixed.
Why does my dishwasher leak only sometimes, not every cycle?
This usually points to a stuck float that's intermittent, a spray arm that cracks open more under certain water pressure conditions, or a gasket that fails only at higher water temperatures. A tech can identify which by watching a wash cycle.
Is my dishwasher leak covered by my homeowners insurance?
Usually no for the appliance repair itself (mechanical breakdown isn't covered). But if the leak caused water damage to floors, cabinets, or walls, that secondary damage may be covered. Check your policy.
Get the leak fixed
QLAMA Appliance Repair services dishwashers across Central Florida. Orlando, Winter Park, Kissimmee, Sanford, Dr. Phillips, Windermere, Oviedo, Lake Nona, Winter Garden, and the surrounding 30-mile radius. Residential and commercial. We carry the most common dishwasher parts on our trucks so most leak repairs are single-visit when the diagnosis is straightforward.
Book an appointment online or call us at 561-320-7695. The diagnostic is $90 and gets waived if we do the repair.