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Portable Dishwasher Trips Circuit Breaker Maytag portable dishwasher Model# DWC7400AAW serial# A1181276KD purchased in 1994 I have a Maytag portable

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Old 10-22-2008, 02:01 PM
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Default Portable Dishwasher Trips Circuit Breaker
Model Number: DWC7400AAW   Brand: Maytag   Age: More than 10 years   

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Portable Dishwasher Trips Circuit Breaker
Maytag portable dishwasher
Model# DWC7400AAW
serial# A1181276KD
purchased in 1994

I have a Maytag portable dishwasher I purchased in 1994 which has worked flawlessly, but last night, during the "wash" cycle it abruptly stops. I noticed that the circuit breaker on the AC outlet that I had the dishwasher plugged into had tripped. I reset the circuit breaker, turned the dishwasher on again, and it tripped the circuit breaker immediately again. I then switched the plug for the dishwasher to another outlet and it tripped the circuit breaker for the other outlet. I tried both of the above with the cycle setting knob on wash (activates the motor to wash the dishes) and also changing the cycle setting knob to the dry setting (activates fan only to dry). The circuit breaker tripped in all of the
above scenarios.

I smelled no odor. There was no water on the floor. I emptied all the water out of the tub (all that I could, there was some I couldn't soak up, even with a rag) and put a fan on the open dishwasher overnight to dry it out, thinking maybe it might dry out a leak onto any electrical circuits and the dishwasher might function again. In fact, I tried it just now, setting the cycle setting knob to the dry setting, and guess what, the blower fan came on, and the circuit breaker didn't trip (Note that the interior tub is not bone dry, even though I had a fan on it all night, as I can feel some water in the tub when I stick my fingers in what looks like a finned area where I believe the water exits the tub). I also turned the cycle settings knob to the middle of the wash cycle, plugged it in, and the motor came on, also without tripping the circuit breaker. So far, so good.

I am guessing that maybe a gasket might be bad and have leaked water onto an electrical component, causing a short. Maybe it was a gasket which prevents water from leaking on the motor? Does anybody have any idea what gasket might be the bad, or should I simply replace "all" suspect gaskets? I saw a website which had exploded parts schematics of my dishwasher but I can't remember which website that was. Does anybody know the website with these exploded parts schematics?

In short, any general advice on what I should do next. I don't want to operate my dishwasher again until I fix this.


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  #2 (permalink)  
Old 10-22-2008, 02:16 PM
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Here's is your breakdown Model DWC7400AAW

I would start by removing the lower panel (kick plate) and looking for signs of any leaks, like hard water or soap residue. That will help pin point where the leak maybe.
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Old 10-22-2008, 04:12 PM
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If I understand you correctly, I did as follows:

I removed the "toe-panel," which has on the back of it Maytag part #9-11897 (but it is listed on this website as Whirlpool part# AP4319226) and observed the bottom panel of the dishwasher, which is called in the schematic on this website as the "Bottom, cabinet" (Whirlpool Part Number: AP3990250). This appeared to have some dried water stains on it. I suppose this indicates some kind of leakage. It may have been wet before, but as I said previously, I put a fan on the dishwasher all night to "dry it out" to try to get rid of what I believed may have been a short due to water leakage, and everything appears dried now.

I guess I now have to examine the entire interior for signs of a leak. This could be a real pain as there are a whole bunch of gaskets, any one of which may have leaked.

Last edited by repairbymyself : 10-22-2008 at 04:19 PM.
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Old 10-22-2008, 04:23 PM
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You should be able to see fairly clearly where it has been leaking. As you suspected look near the motor. Your unit was made by Mayteg, but Whirlpool bought Maytag last year, that's why a lot of the parts are listed that way.
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Old 10-22-2008, 05:05 PM
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Nat -
I am trying to access the motor to inspect it. I have the front of the dishwasher on blocks. I am trying to figure out what to remove next to get to the motor. In the door schematic there is a small panel just below the door panel in the front. Is this what I need to remove or do I need to remove the entire metal cabinet which surrounds the tub (if this is even possible).
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Old 10-22-2008, 07:07 PM
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update -
I managed to remove the smaller front panel located below the front door panel and discovered water stains with dried dishwasher detergent on the right side near some wires the air blower (see the two pictures). I believe the leak is at the main door seal but I am not positive.

Question -
Should I run the dishwasher and observe any leaking or would this possibly cause damage to the dishwasher due to possibly shorting my dishwasher again?
Attached Images
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File Type: jpg !cid__media2.jpg (42.1 KB, 49 views)
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Old 10-22-2008, 08:37 PM
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Here's the breakdown of your unit - Model DWC7400AAW

Look on the Tub page at part #13, this should twist and you can lift the entire pump & motor assembly, make sure you disconnect the wire harness and hoses from the bottom first.

I would probably suggest replacing the entire pump and motor due to water getting into the motor, part number AP403003 plus it's a lot faster than trying to figure out which and how many seals are leaking.

Nat
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Old 10-22-2008, 08:48 PM
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Nat -
The leak appears to be at the right front near the blower assembly and some wires near the blower (see pictures in previous post) rather than where the motor is in the middle of the unit.
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Old 10-22-2008, 08:54 PM
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But the water probably got into the motor causing the short and throwing the breaker like that. Of corse I can't see everything you are looking at, this is something we have ran into before and replacing the seals only didn't work.
Nat
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Old 10-23-2008, 07:15 AM
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Nat -

So what you are saying is that the leakage I saw at the front right near the blower, probably due to failure of the door seal, is unlikely to have caused the short and that replacing the motor & pump assembly - Part Number: AP403003 is the most likely solution?

So typically failure of the door seal does not typically cause a shorting problem?

Would there be any point to running the dishwasher again and trying to replicate the short and see where it becomes wet to pinpoint the leak (to see where and if it occurs in a place other than the motor) or do I risk damaging the dishwasher in doing so?
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