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Old 07-29-2010, 08:46 PM   #1
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I'm a-lookin' for help from my mechanical buddies here at DC.

I have a twenty year old Crowley Electric dishwasher. The unit has to revolving sprayer arms, one on the bottom, and one on top. The bottom sprayer arm also features a telescoping center column that rises under water pressure and sprays the second tier of dishes (where the glasses and bowls go). I have two problems with the unit. First, the top arm doesn't spin. I've torn the whole dishwasher apart, examined all hoses, and the water pump. I can find nothing blocking the water flow, and the arm spins easily by hand. This problem has been there for years.

The second issue is more serious. When dishwasher soap is used, after all cycles are completed, there is a layer of waxy soap film on most of the dishes. I have run bleach through the machine, boiling water, and vinegar. I've even tried CLR. Nothing has resolved the problem. My water is as hot as ever, and I can hear the water spraying around inside. If anyone has experience in resolving these problems, I'm all eyes.

Thanks.

Seeeeeeya; Goodweed of the North

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Old 07-30-2010, 06:50 AM   #2
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From what little I've seen of tap water in Michigan, much of it has a pretty high mineral content (including such high iron content that some chrome plumbing fixtures become discolored or stained).
Assuming your pump is generating adequate pressure, I'd:
- check for the need for o-ring replacements
- check for clogged sprayer jets using 70 - 120 psi compressed air
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Old 07-30-2010, 10:50 AM   #3
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Quote:
Originally Posted by justplainbill View Post
From what little I've seen of tap water in Michigan, much of it has a pretty high mineral content (including such high iron content that some chrome plumbing fixtures become discolored or stained).
Assuming your pump is generating adequate pressure, I'd:
- check for the need for o-ring replacements
- check for clogged sprayer jets using 70 - 120 psi compressed air
I have great tasting, but very hard well water. That's why I tried the CLR. But checking the o-rings is a great idea. The problem would almost have to be lack of water pressure, wouldn't it. And I increased the pressure in my pressure tank to 60 lb. from 50 lbs. And so I don't think it's the line pressure.

Thanks.

Seeeeeya; Goodweed of the North
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Old 07-30-2010, 12:02 PM   #4
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I'm not mechanical but with a 20 yr old machine, you might do better with a replacement!
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Old 07-30-2010, 01:20 PM   #5
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I'm not mechanical but with a 20 yr old machine, you might do better with a replacement!
That takes something that is in short supply right now, money. I haven't had so much as a cost of living raise in thee years. Half of my paycheck is gone to health insurance and yaxes before I ever see it.

Seeeeeya; Goodweed of the North
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Old 07-30-2010, 01:28 PM   #6
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Quote:
The second issue is more serious. When dishwasher soap is used, after all cycles are completed, there is a layer of waxy soap film on most of the dishes. I have run bleach through the machine, boiling water, and vinegar. I've even tried CLR. Nothing has resolved the problem. My water is as hot as ever, and I can hear the water spraying around inside. If anyone has experience in resolving these problems, I'm all eyes.
I think I can help with the second issue, Goodweed. I have what I think is the hardest water on earth, and my "so called clean" dishes were terrible. This is what I do now.......Start the washer on the short cycle,(sometimes called rinse cycle) and wait to hear the water spraying. Open the washer and pour in a cup of white vinegar. (I buy it by the gallon at Costco). Close the washer and run it till it stops spraying. Then set the washer for the full wash cycle and add your dishwasher soap (I use cascade). After the full wash and dry, my dishes are sparkling clean. Works every time. Hope this helps.
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Old 07-30-2010, 01:30 PM   #7
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If there is any type of filtering system (in the dishwasher) in the supply line...check that.
If not....I highly suspect a weak motor/pump if the impellers are good.....
Check the price of a new pump/motor...compared to a new machine....The question then begs.. is it worth the price of a new motor/pump in a 20 year old machine...
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Old 07-30-2010, 01:51 PM   #8
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That takes something that is in short supply right now, money. I haven't had so much as a cost of living raise in thee years. Half of my paycheck is gone to health insurance and yaxes before I ever see it.

Seeeeeya; Goodweed of the North
I know all about that shortage GW! The last 3 years we've been paying 2 college tuitions on one paycheck! And DH makes what the financial aid folks say is "too much" to qualify for assistance. That said, you might be able to replace it rather cheaply if there is a scratch and dent type sale.
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Old 07-30-2010, 01:55 PM   #9
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Goodweed, you may want to also try asking here......

Appliances Forum - GardenWeb
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Old 07-30-2010, 02:50 PM   #10
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If you do find that you need to replace it, see if there is a Habitat for Humanity Restore near you. You can find some REALLY REALLY good deals there, better than scratch and dent.
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