Question about Dishwashers

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Kitchenaid dishwasher - small pieces of food are left on otherwise clean dishes. Water level comes to about 1 inch below heater coil. I ran it without dishes (or soap) and added about a quart of water so that level came to about 1/4 inch below heater and that's when I noticed food pieces on drain surfaces (nylon filter under bottom spray arm unit and circular plastic "trap" surrounding it). Spray arms holes are clear and water is hot.

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  • rlittles Sep 22, 2008

    Added rinse agent, re-cleaned mesh filter (below bottom arms) ands problem persists. After several washes, top rack (glasses) still have dried pieces of food on them. Bottom items are clean. Mesh filter has particles of food on it. It's as though the bottom holes on the lower arms which are supposed to flush the particles off the mesh filter and into the pump is not working.

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It sounds as if you figured the solution out. The holes in the spray arm(s) get plugged by small debris, (tooth picks, seeds, bits of plastic like candy wrappers, etc) and the water does not reach the dishes to wash and rinse effectively. Try placing the wash arm(s) in one position and marking one side, then running the dishwasher for a minute or so. Open door to see if arms have moved. If some holes are plugged, arm(s) may not be rotating. Also check that there are no obstructions which would interfere with wash arm rotation.

Posted on Sep 22, 2008

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Posted on Sep 11, 2008

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You need to clear the filter on the dishwasher so food particles can pass...also try using jet dry in the wash mode it really helps

Posted on Sep 11, 2008

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Hi,

If your dishwasher is cleaning poorly, check these:

Water-inlet valve
Internal filters
Drain valve
Spray arms
Water temperature
Detergent cup
Water-inlet valve Most cleaning problems are caused by the dishwasher not getting enough wash water, so the water-inlet valve is often to blame. This valve is usually at the bottom left or right of the dishwasher, behind the lower access panel. It's the device with the main water line from the house, a rubber tube to the dishwasher, and two wires attached to it.

When a water-inlet valve is defective, you may hear the sound that's usually referred to as "water hammer." If the water-inlet valve is defective, you need to completely replace it.

Dishwasher Water Inlet Valve Replacement

Be sure to read and understand any instructions that come with the new water inlet valve.

Tools required:

Adjustable wrench

Multi-Screwdriver

Pliers

Step 1. Disconnect the dishwasher from its power source.

Note: Dishwashers are usually wired directly to the home’s electrical system. To disconnect the power, switch off the circuit breaker or remove the fuse for the electrical circuit the dishwasher is attached to. Try to turn the unit on after disconnecting the power to be sure you were successful.

CAUTION: If you’re not sure you’ve shut off the power properly, DO NOT CONTINUE. Call a qualified appliance repair technician to complete the repair.

Step 2. Turn off the water supply to the dishwasher. This is usually underneath the kitchen sink or in the basement or crawlspace near the location of the dishwasher. Pliers may be helpful here.

Note: If there are no shut-off valves, you must shut the water off at the main water supply valve for your home.

Step 3. Remove the lower panel(s) of the dishwasher. These are usually held by 2 to 4 screws at the upper and lower corners of the panel(s).

The inlet valve is usually near the front of the dishwasher. Attached to the valve you’ll see: 2 or 4 wires, the water supply line from the house and the water feed line that goes to the dishwasher.

Step 4. Remove the household water supply line from the valve. The line is usually secured with a brass compression nut. The water supply line is usually copper or braided stainless steel.

CAUTION: Water supply line may be hot.

Step 5. Remove the fitting from the valve the water supply line was attached to. This fitting may be very difficult to remove. It may help to put the valve into a vice in order to remove the fitting. If you cannot remove it, replace it. The fitting is not an appliance part but a plumbing part that is available at most hardware stores.

Step 6. Remove the screws holding the valve to the dishwasher frame.

Step 7. Label the wires to the valve so you’ll be sure to reattach them correctly.

Step 8. Remove the wires from the valve.

Step 9. Remove the clamp on the black rubber water discharge tube and pull the tube off of the valve.

Step 10. Reinstall the old fitting (or a replacement fitting if necessary) onto the new valve the water supply line was attached to. Use Teflon tape or pipe joint compound as a thread sealant. Make this fitting tight to prevent leaks. Make sure that the fitting points in the same direction as the old one so that the water supply line will meet up with it properly.

Step 11. Install the new valve in the reverse order of the removal instructions.

Note: The water supply line is under high pressure. Be sure to tighten the fittings properly.

Step 12. Turn on the water to the machine, and check for and correct any leaks.

Step 13. Reinstall the access panel(s). Restore the power to the dishwasher and test.

Note: You may have to let the dishwasher run a few minutes before it reaches the next water fill cycle.

Internal filters Every dishwasher has some type of filter to keep large food particles and foreign objects away from the pump assembly:

  • Most modern dishwashers have self-cleaning filters that don't need any routine cleaning.


  • Some have filters in the bottom of the dishwasher that you need to periodically clean. You don't need any tools to remove the filter, and cleaning it is easy. Consult your owner's manual to determine which type you have and its maintenance requirements.


If your filter is clogged, it may be causing the cleaning problem.

Drain valve Some dishwashers have a valve (or gate) that should open only during draining. If debris lodges in the valve, it can't close properly, so water drains out during the wash cycle. Most dishwashers drain into the garbage disposer. If yours does that, listen for water flowing into the disposer during the wash cycle. If you can hear it then, the drain valve may be clogged.

Spray arms There's a spray arm at the bottom of your dishwasher--it may have a tall spray tube mounted to the center of it. There may also be a spray arm located directly beneath the upper rack of dishes and/or above the upper rack.

If debris is blocking the holes in the spray arms where the water comes out, it could cause cleaning problems. Regularly inspect each of the spray arms and clean out the holes as necessary.

Water temperature To get the best cleaning results, the water entering your dishwasher needs to be hot enough. Try running the hot water in your kitchen sink for about 30 seconds before starting the dishwasher, to pre-heat it. Also, if your dishwasher lets you select a higher wash or rinse temperature, try that to see if it helps.

To check the temperature of the hot water that comes from your kitchen faucet use a waterproof thermometer. If the water isn't 120 degrees Fahrenheit, your dishwasher may have trouble getting your dishes clean. You could increase the temperature of the hot water to the whole house--and therefore the dishwasher--by adjusting the hot water heater thermostat.

Warning! To lessen the risk of scalding, don't set the hot water heater temperature higher than 120 degrees Fahrenheit.

Detergent cup Dishwashers don't perform their best if detergent is introduced only at the beginning of a cycle, so add detergent to both parts of the cup.

If the detergent cup isn't opening, see the "The detergent cup doesn't open" section, below.

Posted on Sep 11, 2008

  • Priya darshan Sep 11, 2008

    Dual action detergent usually contains rinse aid, which is released at
    a different rate to the cleaning agent and so helps reduce smearing etc
    without the need to add separate rinse aid. Some 3-in-1 tablets contain
    an ingredient, which has a 'salt action', which also helps to improve
    cleaning, but NOTE this is not a substitute for adding salt to the
    water softener. The salt action takes place in the cleaning chamber of
    the machine, but does not actually replenish the water softener.
    Research has shown that whilst 3-in-1 detergents do clean dishes
    effectively, their performance is improved by adding salt to the water
    softener reservoir.

    As the performance of machines can
    vary, as can local water conditions, it is always best to follow your
    manufacturer’s advice. Some manufacturers advise that if you have
    unsatisfactory cleaning performance eg white powder residue, poor
    drying or dirty dishes, then you should return to using three separate
    products ie detergent, rinse aid and granular salt. Be aware that if
    you have not been filling the salt reservoir and relying on the salt in
    3-in-1 tablets, then it may take a few cycles to re-generate the
    softener.


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Which detergent type is better, liquid gel or powder?

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To avoid the wait, increase the incoming water temperature before turning on the dishwasher. Do that by running the kitchen sink faucet until the water runs hot. Or increase the temperature of the hot water to the entire house at the hot water heater.

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When a water-inlet valve is defective, you may hear the sound that's usually referred to as "water hammer." If the water-inlet valve is defective, you need to completely replace it.

Dishwasher Water Inlet Valve Replacement

Be sure to read and understand any instructions that come with the new water inlet valve.

Tools required:

Adjustable wrench

Multi-Screwdriver

Pliers

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