Question about Kenmore Elite 45986 Front Load Washer
Washer shuts down when the F 11 code faults the cycle at rinse.
F11 is a serial communication error. Information between the central control and the motor control cannot be sent correctly. C01 through C08 is just the test sequence: 01=fill by cold water, 02= dispensor motor, 03=fill by hot water, 04=drum rotates clockwise, 05=heater on, drum rotates, 06=drain pump actuated, 07= drum rotates counter clockwise, 08= high spin. You are recieving a fault before the test can complete.
Here is a posting of some one who had the same problem:
I have - since posting the original - tried to remove the serial cable connectors from both ends of the cable and soldering the wire right to the PC boards. It seemed to help, but the F11 returned. I think the temporary help had to do with powering down and up. In fact, I found that if I powered down and let the machine "rest" I could get at least one load out before F11 came back.
I finally bit the bullet and bought a new MCU at around $200. I have a family of 6 and a malfunctioning washer just isn't an option. I replaced it in mid January and haven't had the dreaded F11 since.
I did notice that on the MCU (that I removed) there is a small transformer that must be for the DC power supply to the board. I bet this powers the low voltage inputs/outputs as well as the processor (via some additional regulation). This transformer looked like it has been getting hot. The iron laminations and dielectric of the windings was irregularly blackened in places.
I further speculate that as the transformer gets hot, it starts to sag the DC Voltage of the MCU. The lower DC voltage could cause faults in the processor, faults in the serial comms, any number od problems.
Unfortunately, I feel the ultimate resolution to the problem is to replace the MCU. I do believe that the anti-vibration techniques listed in this thread would be good preventive measures. Vibration is no friend to electronic components hanging on by solder - especially relatively heavy objects like transformers and bigger capacitors.
Posted on Dec 17, 2007
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Posted on Jan 02, 2017
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