Thread Number: 92201
/ Tag: Vintage Automatic Washers
KitchenAid KDI-21A drain problems |
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Post# 1167747 , Reply# 1   12/28/2022 at 17:27 (456 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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If you’re not hearing the motor run at the end of the cycle when it’s supposed to do the final drain, it’s either a bad timer, you tried that or the motor is overheating check and see if the motor is really hot to the touch toward the end of the cycle you may have a motor that’s failing.
Usually the bi metal detergent dispenser parts can be adjusted. There are no contacts to clean. I’m not sure what you did. If the motor is going and you don’t have a spare it might be time to listen to your wife and get that new whirlpool Maytag, or KitchenAid dishwasher. But I’m happy to try to help you fix this one if you get some more information to us. John. |
Post# 1167877 , Reply# 3   12/30/2022 at 13:38 (454 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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The motor needs to run in the drain direction at least 4 to 6 times during the cycle, there’s a cycle chart inside the main door panel. Compare the times on that to the actual times. It’s operating
From what you’re describing it’s got a bad timer if the motor is not reversing and running in reverse to drain the water. To adjust the buy metal I usually just loosen the Phillips screw that holds it in and pivot it a little bit away so that it doesn’t put quite as much hold on that arm. Usually that will work. You could also try slightly bending it. It’s also important that when the arm is released, the cup opens with a snap and it’s not binding Let us know what you find. John |
Post# 1167891 , Reply# 5   12/30/2022 at 18:39 (453 days old) by qsd-dan (West)   |   | |
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I have never worked on a 21+ KA, but I would guess if this works anything like a washing machine motor that runs one way to agitate and the opposite direction to spin, the problem is most likely in the motor start switch/relay. The only other possibility *may* be the program switch, which do go wonky after several decades of heavy use. |
Post# 1167899 , Reply# 7   12/30/2022 at 19:09 (453 days old) by DADoES (TX, U.S. of A.)   |   | |
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BCorey: How does the motor running CCW cause the drain to open?The pump has two pumping chambers with separate impellers on the single motor shaft. The vanes on the recirculation impeller are oriented to push water through the spray arms when the motor runs in the "forward" direction. The drain impeller likewise is designed to move water out the drain hose only when the motor turns in the "reverse" direction, effectively does nothing when the motor runs "forward." The direction in which the motor runs is controlled by the timer, according to which contacts on the motor it sends power. |
Post# 1167907 , Reply# 9   12/30/2022 at 19:38 (453 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Non-draining KitchenAid dishwasher
The problem you’re describing cannot caused by the relay the relay has nothing to do with direction the motor runs this function is also not controlled by the program switch. When you look at the wiring diagram, you’ll see that the motor has a run winding and to start windings. There’s a start winding to start in the direction of drain and there’s a start winding. It started in the direction of wash which is labeled motor on the diagram. it’s possible if the machine periodically just sits there and doesn’t run at all when it’s supposed to be draining, you could have a bad drain start winding which is a bad motor, but it would be very unusual for it to work sometimes and not other times. Given that you replace the timer, if you can’t figure it out, I would replace the main motor. It’s really the only other possibility. John |
Post# 1167940 , Reply# 10   12/31/2022 at 00:58 (453 days old) by bcorey (California)   |   | |
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Ordered the used one -- as you said John, can't really be anything else at this point... |
Post# 1168185 , Reply# 12   1/3/2023 at 08:53 (450 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Hi Bruce, thanks for sharing your experience with your KD 18 series KitchenAid dishwasher, problems like this were common with that design.
Often it was broken glass, etc. that got into the drain valve etc.. The KD 21 series is entirely different does not have a drain valve to start off with also has a very strong grinder. I’ve never seen anything in the drain line of a KD 21 or 22 dishwasher Hobart really redesigned that system because there were so many problems with KD 15 through 20 Dishwashers not draining properly. John. |
Post# 1168471 , Reply# 14   1/6/2023 at 15:26 (447 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Reply number 13
You definitely have a bad motor that motor is in terrible shape. It’s had so much water in it. It probably has a bad drain start winding. I would replace the entire pump and motor assembly with a good one from a more lightly used machine any KD 21 or 22 dishwasher motor will work. John |
Post# 1168474 , Reply# 15   1/6/2023 at 17:13 (447 days old) by bcorey (California)   |   | |
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John -- I have another one ready to install. Did you see my question about how to pry it apart safely? |
Post# 1168476 , Reply# 16   1/6/2023 at 17:20 (447 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Post# 1168477 , Reply# 17   1/6/2023 at 17:27 (447 days old) by bcorey (California)   |   | |
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Here's what I got:
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Post# 1168489 , Reply# 19   1/6/2023 at 18:38 (446 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Once you remove the two or three clips, simply take a board or a prybar and put it underneath the motor and push up on it it will pop the motor up into the tank slightly and then you lift the entire motor and pump assembly out from the inside of the dishwasher from there. You disassemble the old pump and reassemble the pieces on to the replacement motor
You’ll probably need a new main shaft seal at a minimum and you may have to replace the gasket around the pump assembly that fits into the tank of the dishwasher depending on what shape it’s in you might be able to reuse it. |
Post# 1168503 , Reply# 21   1/6/2023 at 21:00 (446 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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