You open the dishwasher after a wash, reach in for a clean plate, and your hand lands in an inch of gray water sitting in the bottom. Food bits float on top, it smells a little sour, and the dishes on the bottom rack are still wet and grimy. In Orlando we get this call constantly, and most of the time it is not a dead machine. The water just has nowhere to go.
Here is the honest version. The large majority of no-drain dishwashers come down to a clog you can clear yourself at the sink in about twenty minutes. A smaller share trace back to the drain pump or a stuck valve, and those need a tech. Below are the causes in the order we actually find them, and the steps to clear the easy ones first.
A clogged filter and sump full of food debris
This is the number one cause, by a wide margin. Most modern dishwashers have a removable filter at the bottom center under the lower spray arm. Food, grease, and Orlando's hard-water scale build up in that filter and the sump below it until water cannot pass through. Pull the filter, rinse it under hot water, and clear any gunk in the sump. That alone fixes most no-drain calls.
A quick note on what this is and is not. Standing water that never leaves the tub is a drain problem, and that is what we are walking through here. If your dishes come out cloudy or still dirty but the water drains fine, that is a cleaning issue, a different fix. If you see water on the kitchen floor, that is a leak, also different. Drain trouble is the gray water pooled in the bottom that sits there cycle after cycle.
A clogged or kinked drain hose
The drain hose runs from the dishwasher pump up under the sink to the disposal or the air gap. It can kink where the machine got shoved back during a counter or floor job, and the inside coats with grease and food over the years until the opening narrows. Pull the machine forward gently and look for a crimp. Disconnect the hose at the disposal end and check it for a clog you can flush out.
The garbage disposal knockout plug was never removed
This one trips up a lot of people, and it is very common right after a new disposal goes in. A brand-new garbage disposal ships with a solid plastic knockout plug sealing the dishwasher drain inlet. If whoever installed the disposal did not knock that plug out, your dishwasher water hits a sealed wall and backs up every cycle. If your dishwasher stopped draining the day a disposal was swapped, this is almost certainly it. The plug pops out with a screwdriver and a hammer tap, then you fish the disc out of the disposal.
A clogged air gap on the sink
The air gap is that little chrome cylinder sticking up next to your faucet. It keeps dirty sink water from siphoning back into the dishwasher, and it gets clogged with the same food sludge as everything else. If water bubbles up out of the air gap during the drain, or spills onto the counter, it is blocked. Twist off the cap, pull the inner cover, and clean out the debris with a brush. Not every kitchen has one, but if yours does, it is an easy check.
A failed drain pump or a jammed impeller
If the filter, hose, and disposal inlet are all clear and water still sits, the drain pump is the next suspect. The pump has a small impeller that pushes water out, and a piece of broken glass, a fruit pit, or a popcorn seed can jam it so it cannot spin. You may hear a buzz or hum during the drain as the motor strains against the jam. Clearing a jammed impeller or replacing a burned-out pump is a tech job on most machines. A drain pump part runs about $30 to $90 at retail, and getting to it means pulling the dishwasher.
A stuck check valve or a missing high loop
The check valve in the drain path is a one-way flap that stops drained water from flowing back in. If it sticks, water either will not leave or siphons right back. The other version of this is a missing high loop: the drain hose is supposed to rise up high under the counter before it drops to the disposal, and if it runs flat or low instead, the dishwasher can siphon dirty water back into the tub. Re-routing the hose into a proper high loop is a quick fix. A stuck valve usually means a part.
How to clear the clog yourself
Before you call anyone, run these steps in order. The first three solve most no-drain cases, and you only need a cup, a towel, and a screwdriver.
- Turn off the power. Switch off the dishwasher at the breaker or unplug it under the sink. You are going to have your hands in standing water, so kill the power first.
- Bail out the standing water. Scoop the gray water out of the bottom with a cup or a small container, then sop up the rest with a towel. You want the tub as dry as you can get it before you go after the filter.
- Pull and rinse the filter. Twist the cylindrical filter at the bottom counterclockwise, lift it out, and rinse it under hot water until it is clean. Wipe out the sump area underneath and remove any chunks of food, glass, or debris you find sitting in there.
- Check the hose at the disposal and the air gap. Look under the sink. Make sure the drain hose is not kinked, confirm the disposal knockout plug was removed if the disposal is newish, and clean out the air gap cylinder if your sink has one.
Run a short cycle and watch whether the water drains. If it clears, you just saved yourself a service call. If it still pools, the pump, the check valve, or the disposal inlet is the next stop.
One Florida habit worth keeping. Scrape plates well before loading, and run the hot tap at the sink for a few seconds before you start the dishwasher so the wash begins with hot water. Both cut down the food and grease that settle into the filter and sump, which is exactly the sludge that causes most no-drain calls down here. A monthly filter rinse takes two minutes and saves you the gray-water surprise later.
What a dishwasher drain repair costs
For real numbers, Yale Appliance's 2025 service data puts the average dishwasher repair at about $180, with most jobs landing between $140 and $400 depending on the part. A drain pump swap sits in that range. The pump part itself is roughly $30 to $90 at retail, and a drain hose is about $15 to $40. Labor and access are what move the total.
Here is how we handle it at QLAMA. The diagnostic is $90, and we waive it if you go ahead with the repair. We quote a flat price on-site before we touch anything, so there is no hourly meter running. If the fix is not worth it, you owe the $90 and we leave. For comparison, a new dishwasher runs about $400 to $900 installed, so on a machine that is otherwise fine, clearing the drain or swapping a pump is almost always the cheaper move.
When to call an Orlando tech
Call when you have pulled the filter, cleared the sump, checked the hose, and confirmed the disposal plug is out, and water still sits in the bottom. Call when you hear the pump buzz or hum but nothing drains, which usually means a jammed impeller or a burned-out pump. A stuck check valve and a re-routed high loop are also jobs where the tools and access make it worth a tech instead of a Saturday afternoon.
QLAMA Appliance Repair services dishwashers across Orlando, Winter Park, Kissimmee, Sanford, Dr. Phillips, Windermere, Oviedo, Lake Nona, Winter Garden, and the surrounding communities within roughly a 30-mile radius of Orlando, residential and commercial.
Common questions about a dishwasher that won't drain
Why is there standing water in the bottom of my dishwasher?
Most of the time it is a clogged filter and sump packed with food debris, which blocks the water's path out. The next most common causes are a kinked or clogged drain hose, a disposal knockout plug that was never removed, and a clogged air gap on the sink. A failed pump is less common.
My new garbage disposal made my dishwasher stop draining. What happened?
A new disposal ships with a solid knockout plug sealing the dishwasher drain inlet. If the installer did not knock it out, your dishwasher water hits a sealed wall and backs up. Pop the plug out with a screwdriver and a hammer tap, fish the disc out of the disposal, and it should drain again.
Should I run the garbage disposal before the dishwasher?
Yes. The dishwasher drains through the same line, so running the disposal first clears that path. It is good habit, not a repair, but a sink full of food scraps can absolutely back up into a dishwasher mid-cycle.
Can I fix a dishwasher that won't drain myself?
Often, yes. Turn off the power, bail the standing water, pull and rinse the filter, clear the sump, and check the hose and air gap under the sink. Those steps clear most no-drain cases. If water still sits after that, the pump or check valve likely needs a tech.
Is it worth repairing a dishwasher that won't drain or replacing it?
If the machine is otherwise working, repair almost always wins. Clearing a clog or swapping a drain pump costs far less than a new dishwasher at $400 to $900 installed. Replacement only makes sense if the dishwasher is old and has other failing parts on top of the drain issue.
Standing water in the bottom is almost always a blocked path, not a dead machine. Clear the filter, check the disposal inlet, and run a cycle. If it still pools, that is what we fix every week across Orlando, and we tell you the flat price before we start.
Book an appointment online or call us at 561-320-7695. The diagnostic is $90 and gets waived if we do the repair.