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Dirty dishes

Dishes still dirty after the wash?

Hold a candy or meat thermometer in a glass under the hot tap nearest the dishwasher and wait until the number stops rising, a minute or more. Below 120 degrees, the problem in your Honolulu kitchen is the water, not the machine.

Dishwasher detergent cup with a tablet still sitting in it, not dissolved
Short answer

Why is my dishwasher not cleaning dishes?

A dishwasher that stops cleaning is most often fed water that is too cool, since GE says supply water must reach at least 120 degrees F and its machines cannot heat a cold supply up to washing temperature. A clogged filter or spray arm holes plugged with debris come next. Then installation faults: a connection to the cold line, a machine that is not level, or a drain hose run too high. A short or light cycle may not shift heavy soil. White film is a separate case. If lemon juice wipes it off, it is mineral; if not, the glass is etched for good. Only then blame a part.

Wash numbers from the makers

120 F
minimum hot supply (GE)
120-149 F
Samsung supply range
72 in
highest drain hose run (GE)
7 gpg
softest water Samsung advises

Sources: GE Appliances dishwasher support pages; Samsung dishwasher troubleshooting

Cause by cause

What leaves dishes half washed?

CauseHow you can tellOwner check or technician job
Water too coolThermometer reads under 120 F; worse after showers or a bath fillOwner check: run the nearest hot tap first and start later
Clogged filterGrit and food specks on top of platesOwner check: rinse the removable fine filter
Plugged spray arm holesOne rack or one area always dirtyOwner check: clear the holes with a toothpick, paper clip or tweezers
Install faultPoor results from the first week; cold water at the inletTechnician job to move the line, relevel or reroute the drain hose
Mineral film or etchingWhite haze on glassesOwner check: the lemon juice test; etching cannot be reversed
A fault inside the machineEverything above is right and results stay poorTechnician job, as GE and Samsung both advise

What the leftovers on your plates mean

Look at a few glasses and plates before you change detergent. The kind of mess left behind usually tells you which check to run first, in Honolulu or anywhere else.

Gritty specks

Fine grit landing on clean dishes points to a filter overdue for rinsing. GE says monthly; Bosch says every few months.

One dirty zone

If the same corner or rack stays soiled, a spray arm with blocked holes is not reaching it.

Film that wipes off

A white coat that lemon juice or white vinegar removes is hard-water mineral, not damage.

Haze that stays

Cloudiness that will not wipe away is etching, from too much detergent, very hot water or over-softened water.

Baked-on food

Heavy soil after a quick or light cycle usually means the cycle was too gentle for the load.

Poor from day one

A new machine that never washed well may be on the cold line, out of level or draining too high.

On the visit

How does a technician find a weak wash?

1

Inlet heat

On a Honolulu visit the supply temperature is measured at the sink first, because cool water explains more poor washes than any broken part does.

2

Filter, arms

The fine filter is cleaned and each spray arm is pulled, cleared and spun by hand to confirm it turns freely and every hole is open.

3

Install review

Hot or cold line, level, supply line size and the height of the drain hose run are compared against the maker's installation numbers.

4

Test wash

A full cycle runs on a soiled load. If the wash still fails, the pump, heater and controls are tested in your Honolulu kitchen.

01

Water and detergent

Put a candy or meat thermometer in a glass under the hot tap closest to the dishwasher and let it run until the reading stops climbing, which can take a minute or more. GE wants at least 120 degrees F. Do not test, or start a load, right after showers or a bath fill, when the heater is drained.
Try Samsung's test: wipe a glass with lemon juice or white vinegar. If the haze lifts, it is mineral film from the water. Oahu's public supply has historically tested soft to moderately hard, and USGS calls spotty or cloudy glassware a common hard-water sign. If the haze stays, the glass is etched.
No, etching is permanent, so prevent more of it by using less detergent.
Yes. Samsung lists over-softened water as an etching cause and says not to go softer than 7 grains per gallon.
Samsung says to scrape food off but skip the pre-rinse under the tap.
02

Machine and setup

Bosch uses a toothpick; GE suggests a paper clip or tweezers. Take the arm off, clear each hole, rinse it, and make sure it spins freely once it is back on.
It can. GE lists a drain hose run higher than 72 inches among the install faults that hurt washing, beside a cold-line hookup and a machine that is not level. These usually show up as poor results from the first week a new dishwasher goes in, and correcting them is installation work.
Samsung suggests a tub cleaning about every 24th cycle, or once a month.
Short and light cycles use less time and heat, and GE notes they may not handle heavy soil. Save them for lightly used dishes, and run a normal or heavy cycle on pans and plates with dried food. If the normal cycle also leaves food behind on a Honolulu machine that gets hot water, look at the filter and spray arms next.
When the water is hot, the filter and arms are clear and the loading is right, yet results stay poor. GE and Samsung both send the machine to service at that point, and a Honolulu technician then tests the pump, heater and controls.

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