Dishwasher keeps blowing thermal fuse on control baord


Dishwasher Repair

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Hi, I have a kenmore dishwasher 665.13213k900 and the thermal fuse keeps blowing. It is located on the control board.

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Old 08-23-2013, 08:35 PM
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Default Dishwasher keeps blowing thermal fuse on control baord
Model Number: 665.13213k900   Brand: Kenmore   Age: 1 - 5 years   

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I have a kenmore dishwasher 665.13213k900 and the thermal fuse keeps blowing.
It is located on the control board.
I have replaced this fuse 3 times and it will last between 30 and 60 days and then it will blow again.
I used the pigtail harness when replacing the fuse.
I ran the diagnostics and it/I found no problems Heated Dry->Normal->Heated Dry->Normal
Is there something else I could check to see why it keeps blowing?

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Last edited by devitojj : 08-23-2013 at 08:41 PM. Reason: gave location of thermal fuse
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  #2 (permalink)  
Old 08-24-2013, 09:38 AM
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Check your electrical connection at the junction box and make sure you have a white to white black to black and a ground wire hooked up. Then ohm test your heating element make sure it's not shorting out it should be 50ohms or less typically. Then take a an amp clamp multimeter and after turning on unit measure the amperage on the heating element wire while in diagnostic it should be around 7-8amps if it's not your having a problem with the heating circuitry in your unit. Also pull out your unit from the cabinet and inspect the complete harness thoroughly for any burns, brakes, or open wires. Good luck
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Old 09-02-2013, 08:48 PM
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Hey thanks for your help, I had to wait for the long weekend to fix this dishwasher.

I ohmed out the heating element and got 13.7 ohms. I also found the schematic inside the lower floor plate. This schematic said that the heating element should be between 10 – 30 ohms. So I am ok there. The junction box wiring is fine.
I noticed that the heating element wires ran up to the control board and I looked at the connector and found that it was melted slightly and the PC board was discolored from heat. The only reason that there would be heat being generated at a connection is if the connection was not a good one. If the connection is a little loose then it acts as a very low ohm resistor and at 8 amps that would generate a lot of heat. So I cut off the connector and re-crimped on new 3M ¼” female spade connectors that have a plastic protection around them. They are good for about 220 degrees and 30 amps. After doing this I put the dishwaser back together just enough to turn it on and I connected an amp meter at the thermal fuse and got the following readings running the diagnostics cycle:
1st time heater on 1.7Amps
2nd time heater on 8 amps

I also measured the temperature at the new connections I made and it never got over 98 degrees. This is the area where the relays are for the motor and the heating element so the temp reading was coming from this area. The area where the thermal fuse is was only 88 degrees.

It seems to be running fine now at least for 2 days. I currently have a 10 amp fuse in place of the thermal fuse because those dam things are like $25
I ordered a new thermal fuse and it should be here this Friday and I will put it in and remove my 10 amp fuse.

After reading about this problem all over the internet I don’t understand why whirlpool or someone else can’t just tell everyone with the same problem that the real problem is the connector for the heating element. It should not melt. If it is melting at the connector then the connection is no good.

I wish I new the schematic was in the bottom plate the first time I change the fuse. I might of found the melted connector at that time.

I will post back in a couple weeks if the dishwasher is still running fine.
Thanks for your help
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Old 09-22-2013, 04:39 PM
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Default Still working

ok it is now 9/22/2013 and it is still working.
So the problem was just a loose connection going to the heater element that caused the thermal fuse to blow.
Just cut off the factory connector and crimp on new connectors.

Maybe someone should call Kenmores engineering department and let them know there connectors stink.
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Old 09-24-2013, 07:00 PM
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They already know it and Kenmore makes nothing it's a brand name sold at sears. Whirlpool is the manufactures of this and they know they have wiring harness/thermal fuse problems. When you buy the thermal fuse that's why they come with a piece of the wire harness that goes to the main board the the door switches. The contacts in this are loose or become bad over time and cause the thermal fuse to blow or wiring to spark or cause other issues because it arcs over in the connection and is not a good contact or loses contact over time.

Last edited by HumboldtRepairMan : 09-24-2013 at 07:02 PM.
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Old 06-02-2017, 02:19 PM
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Yeah this is a sore spot with these dishwashers. They use cheap "wipe" style connectors for the power relays, which I discovered the hard way when I had a flashing light and no-run. Turned out one of the high-current connections had literally burned the spade connector and plug to a crisp!

I was able to salvage the board (I'm pretty good with board rework) with a direct-wire shunt, and when it burned up the board it did NOT trip the thermal fuse. Nice eh. Well, about a week later the thermal failed, so I replaced it. The new ones they sell are 98C, which are green colored epoxy -- I didn't get the spec off the old one but it wasn't green, so it was definitely a higher-temperature unit, which is probably why the board cooked off with no fuse failure.

It's not all THAT hard to use a quality molex-style connector that won't lose tension over time and burn up like this (ditto for the fuse holder and wiring to it as well), but it does cost a buck each instead of the 20 cents for what they have in there.

As long as it gets out of warranty before it fails they don't care, in short.
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Old 03-19-2018, 09:38 AM
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Default Dishwasher repeatedly blows thermal fuse

This is a Kitchen Aid - KUDKO3CTSS

Never had an issue with this dishwasher (DW) in the past. 4 weeks ago it went dead, did the research and replaced the thermal fuse and associated wiring harness. Used a volt meter to confirm fuse was indeed blown and shorting across the fuse terminals energized the DW. So replaced and all was good until two weeks ago, same situation...no power and fuse was open just like first time.

I read the above discussion reviewed the two possible issues....1) not replacing the entire wire harness (I did replace the entire harness) and 2) loose spade connectors to the heating element that drew excess current causing wires/connectors to melt. Well I looked over the entire harness and found 1) no loose spade type connectors and no evidence of over heating wires.....this is a different make/model than what has been discussed.

When the fuse blows about an inch of water is left in the bottom of the DW.

There was mention of running a diagnostic cycle for the DW....I can't find any details on HOW to do this for a Kitchen Aid.

What are the next steps suggestions to run down causes to this fuse to keep blowing? Thanks!!

Read more: Thermal fuse blows multiple times
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Old 03-22-2018, 01:13 PM
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Loving this thread! sub'd
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Old 05-04-2018, 06:07 PM
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Default To kjhume: If you can't find YOUR dishwasher brand in the posts...

KitchenAid, Maytag, Kenmore, Whirlpool, they are all the same dishwasher, made by Whirlpool, I think, and marketed under different brands. I discovered this when I replaced my control panel a year and a half ago. I had to research how to replace the panel and went to YouTube videos. Every dishwasher was the same (often identical) inside. Now my dishwasher has stopped working completely. No lights, no nothing. After some electrical sleuthing I discovered it's the fuse. I've ordered 2 new ones (Price was around $8.50 each.) and will check the wiring harness first. Thank you all for this discussion. Time to learn something new!
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Old 05-05-2018, 01:24 AM
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Default Acer Laptop Battery Repair Service

Just dial Acer Customer Support Number 1-866-304-2154 Toll-Free and get more information or technical help to troubleshoot all kind of technical problems.
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