Early KitchenAid KDS-21: The Holy Grail Has Finally Been Found

[jil1000]

Learned something!

I had no idea the models were different between the 21s. Makes complete sense though! I for sure knew about the 22s and being changed over to Whirlpool, but assumed all 21s were still Hobart built. I like yours even better! Hehe.
If I had to choose, I’d say my most favorite is the 20 over the 18. They are both powerful machines, but I like the temp regulation of the 20 and the wash arm. The buttons on the 20 visually appeal to me more as well. As far as cleaning goes, I can’t say one outperforms the other, but the 20 seems to dry the dishes better than the 18. If I had a dream hobby it would be plucking all the vintage Maytag W/Ds, KDS 18, 20, 21s, and 60s GE and Frigidaire fridges, and MCM Eams chairs around the US and restoring them. Ahhhh wouldn’t that be amazing?!

 

[thatwasherguy]

Hey now!

Save some for the rest of us! LOL. I agree, I absolutely love the KDS-20. I always thought that it was the second best DW ever made, right after the KDS-21. I read on here that the 20 series had a redesigned drying system, which would explain why the dishes dry better than in the 18 series. I’ve also read that the vent location on the 18 series can contribute to rust in the corner of the lower rack if heated dry is used, which was fixed in the later models.

I’ve officially started working on the machine. I got all the itchy, mouse infested cotton candy removed and thrown away last night. I also got the majority of the glue that held said evil cotton candy to the tub scraped away as well. I spent about two hours cleaning it after these pictures were taken. What really amazes me is that all of the rubber is still flexible, and doesn’t appear to be deteriorated. The only deteriorating rubber I’ve seen so far is the seal around the detergent dispenser, which will be addressed in due time. I don’t know what kind of rubber was being used in these DWs, but it was top notch. So far, everything looks like it’s pretty much completely intact still, which I guess makes sense, given that it still works fine. The only issues that I’m aware of so far are the motor bearings, the detergent dispenser seal, dirt, and some surface rust. I plan to dismantle the entire machine to clean it, and check for any rust that needs to be treated. Since I’m going so far into it, I’m wondering if it would be worth adding a constant rinse arm to the top of the tub, and changing out the hold thermostats to ones from an 18 series machine, so that I can get hotter temperatures. I’m planning to run it again later today, and I’ve got some pretty bad dishes. Pictures will follow.
Thatwasherguy.

 

[combo52]

KitchenAid Superba dishwasher differences

Reply number 20, the KDS 20 dishwasher uses the same drying system as the 18,20,and 22 of the superb of dishwashers only the 19 had a different system, as it did not have a dry heater at all. It just had a fan to circulate air through the tub after it did a hot final rinse many users did not like this as well because it did not dry as thoroughly and they went back to the KDS 18 dry system on the suburban models for the next few models.

The KDS 20 is a much better performing dishwasher than the KDS 21 the 21 was cheapened to just one final rinse and had too many corrosion problems with racks pump, seals, etc., because the lack of rinsing away the caustic chlorinated phosphate detergent that were used in this time period.

Cleaning performance test KDS 21, the dishes with food on certainly came clean as they would
in any decent dishwasher. The flower vases are more of a mineral stain and probably no dishwasher would get that type of soil or stain off glassware without using an acid, which would not be good for the dishwasher, it’s also a bad idea to wash flower pots, etc. in dishwasher with sand and grit I’ve seen a number of dishwashers damaged by customers trying to wash flower pots in them.

John L

 

[phillymatt53]

My KDS-19 still runs like a champ.
I had to re-seal some hose fittings a while back, but she runs fine now.
As for any rust showing up on the racks, I had a few spots that I sealed up with J-B Weld about 20 years ago, and that cured the issue permanantly.