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Frigidaire dishwasher not draining: what's blocking it and what to do
You opened the door after a cycle and there's an inch of dirty water sitting in the bottom. Maybe you hear a faint hum when it should be pumping out. This page walks through what causes it on Frigidaire and Frigidaire Gallery dishwashers, what you can safely check yourself, and what a technician has to handle.
Answered by an independent Phoenix-area appliance repair company. Not a call center.
- Independent local companies
- One call, no forms
- Phoenix metro only
Standing water at the end of a cycle means the drain pump either isn't running or can't move water through a blocked path. Most of the time something solid is jammed against the drain impeller or packed into the filter and sump, and the pump hums without pumping.
Check these first
Safe to do yourself. Unplug the appliance before you start.
- Run a drain and listen
Hold the Cancel button for about three seconds to start a drain. A low hum with no water moving points to a jammed impeller or a blocked line. Silence points more toward the pump itself or the control.
- Bail the water out and pull the filters
Cut power at the breaker first. Scoop the water with a cup, then finish with a turkey baster or a shop vac. Pop off the lower spray arm, twist the round filter counterclockwise, lift it and the fine screen out, then wash off the gunk.
- Look at the drain impeller
Under the filter is a small plastic cover held by three T15 Torx screws. Lift it and look into the opening on the right side where water exits. This is where a shard from a broken wine glass loves to end up, wedged against the impeller so it can't spin. Pull anything you find out with needle nose pliers and check that the impeller turns.
- New garbage disposal in the last year?
A disposal ships with a knockout plug inside the dishwasher inlet, and plenty of installers leave it in. If that plug is still there, the dishwasher has nowhere to drain. Tap it out and fish the piece out of the disposal.
- Check the hose and the air gap
Follow the drain hose under the sink and make sure nothing is pinched or kinked behind the machine. If you have a chrome air gap on the sink deck, pull the cap and clear any sludge inside. Run the disposal for a few seconds with cold water while you're under there.
- Clean the hose stub at the disposal
Pull the hose off the disposal nipple and push a pipe cleaner or wire brush in. Hardened scale and silt build a ring in that short stub and choke the flow. Owners often clean the filter twice, give up, then find the real clog right here.
What's different in the Phoenix area
Standpipe and filter clogs are routine here
Older Valley homes with original laundry plumbing often have narrow or partly scaled standpipes. If the machine's own filter and hose are clear, the house drain is the next suspect, and that's a plumbing call rather than an appliance call.
Hard water makes this more likely in the Phoenix area
Phoenix-area tap water runs roughly 12 to 20 grains per gallon, which is among the hardest of any major US metro. Scale builds up on inlet screens, valves, heating elements and dishwasher spray arms years sooner than the manuals assume. If this fault points to a fill or heating part, mineral buildup is the first thing a local technician will look for.
Common questions
Will resetting the dishwasher fix it?
A reset clears a stalled cycle, so it's worth one try. Cut power at the breaker for a minute, restore it, then run a drain. If water is still sitting there, the problem is physical and a reset won't touch it.
Is a little water in the bottom normal?
A thin film in the sump recess is normal and keeps the seal from drying out. Anything you could scoop with a cup is a drain problem.
Does vinegar and baking soda clear a dishwasher drain?
It does little for a solid clog or a jammed impeller. Mechanical cleaning of the sump, hose, and disposal stub is what actually clears these.
Is this covered under warranty?
Frigidaire's standard coverage runs one year from purchase on parts and labor, so a pump failure in that window should be handled through the manufacturer's service line. Clogs from food debris or an uninstalled disposal knockout plug are not covered.
Why does it drain fine sometimes and not others?
That pattern usually means a partial restriction, often scale in the hose stub or debris that shifts around in the sump. It tends to get worse until it blocks fully.
Still showing the problem after the checks?
Call and describe what you tried. A local company can tell you what a visit involves.