Hello, welcome to FixYa. The issue on your dishwasher sounds to me like a broken wire or open reverse start winding to your motor based on the symptom you posted, "runs in wash but not in rinse". I would suggest you check all the wires at the motor wiring harness as well as in the door panel at the pivot point for opening & closing. I've actually witnessed this on several occasions. The reason it will operate in wash but not drain is it is a reversing motor, one way for wash and reverse for drain. If you open the kick plate/toe panel at the bottom you should find a wiring diagram which will assist you in which wires to check and which motor windings to ohm for continuity. If you don't find anything like that let me know, I may have a schematic around. I'll watch for your reply and try to assist you in whatever manner I can. Regards, Macmarkus :) Regards, Macmarkus :)
Hello again,
here's an example. check the red wire going to the motor harness/molex connector.
Good luck.
Macmarkus :)
Hi Jon,
Thanks for the reply. You can indeed check the internal wires of the motor (aka windings) but you will need a multi-meter or the like...any device which can measure resistance/ohm values. Remember to remove the harness connection at the motor so as not to get a false reading through the circuit. Let me know what you find and good luck.
Regards,
Macmarkus :)
Hello again Jon,
It's been some time, glad you're still trying to resolve this probelm...many give up at this point or sooner.
Having read your last post is good, all those values look fine. I want to address the later part of your post as it is in line to my initial thoughts if you look back.
You said "this wire goes straight back to the timing circuit with no other components in line. So I believe the problem lies in this area"...exactly and the wire I'd focus on is the red wire.
In my initial post I said "I would suggest you check all the wires at the motor wiring harness as well as in the door panel at the pivot point for opening & closing. I've actually witnessed this on several occasions."
The red wire get's cut thus interupting the motor winding for drain. Check the wiring and let me know what you find and we'll go from there. I'll watch for your next post and continue to help in any manner I can. Good luck.
Regards,
Macmarkus :)
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Hi If you have already cleaned everything and still the issue
is there then I believe the motor is bad and should be replaced. Heating
element is there to maintain the heat inside the unit, testing it will be a
good idea though the hum sound from the motor indicate a bad motor but you can
also check the thermostat ( I don't think good or bad thermostat has anything
to do with motor issue). Hope this helps...please post back for further
assistance. Daniel
If you believe that the motor is fine then the issue can be a bad motor relay that won't start the motor during rinse cycle....check this diagram....part#30 is the motor relay
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Hi, Thank you for contacting
fixya.com. There is possibly a filter screen on the pump that you can get at
and clean. It sounds like the pump is not pumping enough. Remove the lower arm
and clean it out. Also Part of what the timer does is control the motor and
drain valve. The timer motor regulates the length of time power is routed to
each component. If the timer motor does not function properly, it can result in
a wide range of problems. Common symptoms include sticking in a cycle, cycle
times running too long, or failure of the dishwasher to start at all. If the
timer doesn't work properly, the water may not drain and you need to replace
the timer. In many cases dishwashers heat the wash and/or rinse water to a
higher temperature, as the cycle requires. In these cycles, the dishwasher
pauses after it has filled with water, waiting for the water to reach the
pre-set temperature. On some units, the pause is timed and the unit continues
after the allotted time. On others, the cycle can't continue until the water
reaches the higher temperature. If you have this type of dishwasher and the
water isn't being heated (say, because of a problem with the heating element or
thermostat), after the unit stops at the heating cycle, it never continues.
When you repair the heating-system problem, the "cycle problem" is
fixed too.The heating element is used to heat the water and/or dry the dishes.
If it does not function properly it can result in unsatisfactory cleansing of
the dishes or the failure of a cycle to complete properly.Also you can test the
thermostat whether it is bad or not.So these are the probable reasons that you
have to consider when you troubleshoot your problem when the dishwasher won't
proceed to rinse cycle. Please get back to us if
you have further query else please accept the suggestion.
Hi,
Here is a tip that I wrote that will help you with your dishwasher not draining problem...
Dishwasher Problems - Water will not drain out
heatman101
392 views
Usually answered in minutes!
Thank you for the quick reply. I think I should add more info on what I have seen.
When the wash cycle is complete and it tries to go to rinse, the motor will not even spin. I can hear it hum for a few seconds (power is being supplied somewhere).
I have disassembled the internals all the way down to the impeller and spun it by hand. It runs smoothly. I also blew back through the discharge line to verify a flow path (not sure if this was a good idea, but there did appear to be some small obstructions, like plastic debris, pushed back out, and the flowpath is now clear).
If the heating element could prevent the motor from starting, that could be the problem. Do you know how I could verify operation of the thermostat, or is it just a matter of replacement? I will verify that the element is actually heating as well and get back.
Thanks for your assistance.
Jon
Hi Daniel, thanks for the reply.
The thing that confuses me is that the motor (and pump) will work in wash mode, but then not in rinse.
I don't know if the heater could be related (if there is even any problem there), but was thinking it could be some sort of interlock issue that would prevent motor operation when going to rinse.
Thanks for your assistance,
Jon
Macmarkus, thanks for the reply. I think you have put me on the right track. I did find the wiring diagram where you mentioned and it's basically identical to the one you posted. I tugged on all the wires, everything is tight. There is no visual indications of arcing or anything abnormal. The only place where I couldn't check is where the wire physically attaches to the motor (I'm not sure if that's possible - maybe I would have to pull out the motor). I'll get a process meter from work and try to check on resistance tomorrow.
Thanks
Jon
Hi again, took me awhile but I finally got a meter and checked the wiring. The first thing I did was disconnect the wiring harness and checked the wires going to the motor. The resistance ranged from 30.2 to 31.3 MOhm. Not sure what normal values are, but all of them being so close led me to believe there is no issue there (because the motor works in the forward direction, I would expect to see different values). I then checked the wiring from the other side of the harness. The drain wiring shows ~12.5MOhm while all other show ~0. Based on the wiring diagram, this wire goes straight back to the timing circuit with no other components in line. So I believe the problem lies in this area. I have not done any further troubleshooting as of yet, but am interested to check out the timer circuit. What are your thoughts on this?
Thanks for the assistance
Jon
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