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Please help! Fuse keeps blowing

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I need your help! My dishwasher will not complete a cycle w/o blowing the TCO fuse. I just replaced the

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Old 03-18-2017, 01:12 PM
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MikeFixItAll is on a distinguished road
Default Please help! Fuse keeps blowing
Model Number: GU2400XTPQ1   Brand: Whirlpool   Age: More than 10 years   

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I need your help! My dishwasher will not complete a cycle w/o blowing the TCO fuse. I just replaced the fuse, along with a new board, and about 5 minutes after the soap dispenser released, it shut off, and I immediately opened it up to verify the fuse had blown. Wires all seem fine.

Here's some history:
• I'm the only owner, installed in brand new house in 2005.
• Heating element was replaced in first year due to recall, but never had a problem
• Worked perfectly until last year, faulted intermittently and wouldn't finish a load...had the notorious "clean light blinking 7 times"
• Troubleshooting led to finding burned solder points on control board - one at heater relay (K2), the other on the connected blade terminal solder joint at CON1 (W-R).
• Resoldered joints, worked like a champ for 2 months, then died
• Found fuse to be blown. Ordered new fuse with wires, replaced but blew on first load run. Countdown display read 50-something when it blew. On advice, I did not use the wires included with the new fuse, but crimped the existing connectors to ensure a very tight connection on the new TCO.
• Questioning the integrity of my solder repairs, I ordered a like-new used board and fuse.
• New board came with good fuse attached, so I attached existing (original) wires which connected tightly - shouldn't have posed a problem
• Fuse blew on first wash load, about five minutes after soap dispenser opened.
• *** I've noticed the steam vent stays open - I think it's stuck or solenoid is bad. I can hear all the inside noise that I don't ever remember hearing before during any cycle. When I cover it with my hand it is much quieter. Could this be related to the fuse blowing?
• I've pulled the dishwasher out and ohm'd the heating element and high limit thermostat. Both checked good and the connections are clean and tight.

I still have a new fuse w/ wires, but I feel like it's just going to blow again. What would likely cause the failure even with new fuse and control board? Am I missing something?

Thanks for any help!

Mike

Edit: About 5 minutes after initially starting the dishwasher with the new control board and fuse, I stopped the cycle by opening the door to troubleshoot the apparent vent stuck open. The water inside was very warm but not hot, heating element did not feel hot either. It sat long enough for the water to get cool before resuming the cycle. It then finished spraying, drained, refilled and continued as normal. The moment it cut out (about 7 to 10 minutes later), I opened it and felt the water temp - it was lukewarm, as was the heating element. I expected it to be much warmer if not hot. I'm wondering if my problem isn't a bad element...?


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Last edited by MikeFixItAll : 03-18-2017 at 02:02 PM. Reason: Added details
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