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About a month ago, I replaced the thermal fuse (AP3178588) in my 6-year old Kitchen Aid KUDI01DLWH3. I understand these things commonly go bad with age and replacing it usually solves it.
However the replacement fuse has just blown which makes me think there may actually be a thermal issue casing it to happen. Any idea what I should look for next?
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Here are your parts Replacement parts for WHIRLPOOL KUDI01DLWH3 Undercounter Dishwasher | AppliancePartsPros.comHere is the tech sheet http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208537797.pdfI am assuming that you replaced the harness when you replaced the fuse. Could be the vent is not opening, trapping hot air in the unit, but I would have thought you would have noticed that there was no steam/hot air coming out during dry and I would be very hot when you opened the door. I would check it's wax motor with a meter. These can cause a number of problems. Could be a mechanical problem with the vent assembly. It is hard to say what is blowing the fuse as both temperature and amperage can do it. I would check all active components with a meter for resistance. Also check the condition of the wires from the control board to under the machine. Could be that the motor's capacitor is leaking current. Unfortunately I do not know what the normal current draw for this unit should be at different stages of the cycle. Hopefully someone else will jump in with this info and then you could check it with a clamp on amp meter. Could be that you have an intermittent short somewhere in the unit, this will be very difficult to find. |
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Originally Posted by: denman 
I am assuming that you replaced the harness when you replaced the fuse. Actually, no. It wasn't apparent that splicing new wires onto the perfectly good existing wires of seemingly the same gauge could have any impact on the operation of the fuse. Probably a mistake on my part. Hopefully if I replace the harness this time it will solve the problem, although I still don't understand how that's designed to improve things. Originally Posted by: denman
Could be the vent is not opening, trapping hot air in the unit, but I would have thought you would have noticed that there was no steam/hot air coming out during dry and I would be very hot when you opened the door. Steam seems to be venting fine, but the fuse blew during the rinse cycle. Also, I usually use the Energy Saving Dry setting which I believe runs at a lower temperature. I should probably try replacing the fuse again, along with the new wiring harness this time, and see if that solves things first. If it happens again then I guess I'll have to work my way through your list or call for service. Thanks for your help.
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On my KUDS01FLSS2 dishwasher, 6 yo,the wax motor casing has ruptured on the back side and the motor has blown out the back so the contacts contact nothing without the wax motor in place on the vent assembly. Can I still run the dishwasher without blowing a thermal fuse with this wax motor not there?
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