Dishwasher Noisy Hum In Pump: Still Works

I've got a 18 years old KitchenAid Monteray 21 dishwasher which recently developed a loud hum when it tries to evacuate the water between and at the end of it cycles. The engine is running and the water does go out the drain hose, but maybe not completely. It's almost sounds like it's running dry. I can still wash a load of dishes with it but I'm thinking something is up because it's normally not this loud. I removed the lower spray arm and noticed a brass split ring was unseated and a plastic sleeve with snap catches inside it was also unseated. I reseated both but they just don't look right in my mind. Should I start taking apart the pump housing, call a repair place or start shopping for a new one? (I checked all the screens and they are clear.) Would a repair guy be able to find parts to fix an almost 20 year old dishwasher? thx.
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A new dishwasher is likely to washer better with less water than your old one but probably won't last 18 years. I will be surprised if parts are available.

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Even if parts are available, putting a lot of labor cost into an 18 year old appliance is not sound financially. Could go another few years, could go tomorrow. I'd start looking for new. New models hold more, use less energy, are much quieter, and most important, clean better. Fixing your old one will probably cost have the price of new.
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see : http://fixitnow.com/faq.htm
Alan Smithee wrote:

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