110.47088600 Kenmore He5t codes: F28 & F71 - The Laundry Appliance Repair Forum - Do-It-Yourself Appliance Repair Help

The Samurai Appliance Repair Forums Home

Not logged in - Login | Register

The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Laundry Appliance Repair Forum > 110.47088600 Kenmore He5t codes: F28 & F71

Appliance Parts
850,000 Parts (Including Sears-Kenmore)- 70,000 Photos! Return any part for any reason. Appliance repair parts and accessories shipped overnight.

Appliance Breakdown Diagrams
Cool, interactive diagrams that show you how your appliances are put together. A great troubleshooting aid!

Appliance Accessories
Specialty tools for appliance repair, service manuals, water filters, cleaners, and tons of other accessories for all your appliances.

110.47088600 Kenmore He5t codes: F28 & F71

Moderated by: Trying to help, Pegi, hvacdrd, AccApp

New Topic

Author

Post

diyordie
Apprentice Appliantologist

Joined:	Fri Oct 10th, 2008
Location:
Posts:	1
Flavorite Brew:	Americano
Status:	Offline

Posted: Fri Oct 10th, 2008 17:28

Quote

After experiencing the '3 beeps of death', where the washer wouldn't power up, I pulled the MCU and found a corroded serial connector. After cleanup, the machine powers up, but immediately after beginning the fill, it stops, and the door unlocks. The diagnostic produces an F28, and by rotating the cycle selection knob, an F71. Using a scope, I can see what appears to be a serial data stream at the MCU. I can also hear a relay clicking within the MCU, so it must be receiving some kind of commands from the CCU. The windings on the motor show continuity.

What next? I hate to start swapping $200+ boards into it just to troubleshoot.

Update:
Guess no one had a clue. I pulled the MCU board again, and discovered that both of the TCLT1103 optocouplers for the serial communications path are damaged. The board looks to have had wash water dumped onto it, causing it to short out. It must be in a vulnerable location, and I wonder how many failures are due to water leaking out from the tub and onto this board. Now I'm thinking about how to better protect the board from future damage of this nature.

Last edited on Sun Oct 12th, 2008 16:13 by diyordie

Moostafa
The Ayatollah of Appliance Repair

Joined:	Sat Apr 2nd, 2005
Location:	Afghanistan
Posts:	538
Flavorite Brew:	Poppy Salmagundi
Status:	Offline

Posted: Tue Oct 14th, 2008 03:14

Quote

Hello, my experiential friend. Let me be the first to thank you for sharing your hard-won information here at this, the Mecca of Appliance Repair. Many nubile virgins await you in Paradise... provided you recite the Shahadah ("There is no God but Allah, and Muhammad is his messenger.")

____________________
Allahu Akbar!

Moostafa

Current time is 20:50

The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Laundry Appliance Repair Forum > 110.47088600 Kenmore He5t codes: F28 & F71

Use the Search, Lurch!
We have a bizillion pages of specific appliance repair questions and answers here just aching for the furtive caress of your engorged eyeballs. Use this search box to find ‘em.

Find Parts Fast!
Search by part number or model number for best results.
If you don't know your model number - try searching by appliance type, brand or part type.

Appliance FAQs | Find Appliance Parts | Newsletter | Beer Fund | Home

Your Sometimes-Lucid Host:

"If I can't help you fix your appliance and make you 100% satisfied, I will come to your home and slice open my belly, spilling my steaming entrails onto your floor."