Washing machine began flashing many LEDs and beeping every second. VDR4
> is burned black, C26(22uF 200V) and C27(10uF 200V) are bulging.
> Can anyone help identify that VDR? It is a vertical disk about 5/16" in
> diameter, with about 1/4" lead spacing. One lead of it goes to the (-)
> side of both bad caps.
>
> My guess is the caps failed, blowing the VDR, requiring replacement of
> those. Other opinions are welcome.
>
> There are 3 other VDRs on the board which are near each other but not
> near VDR4. These are labeled K2759U, but I have not found a proper
> datasheet for those.
>
> ATF8000FS machine
> PC board #EL1345526
> plastic case labeled 134847902
> Online search brings up 137007000NH as the assembly.
The K2759U is a 275 volt MOV (aka VDR - Voltage Dependent Resistor). The full part number is LIKELY S10k275. A probable(*) replacement part is Digikey 495-1433-ND.
- = I say probable because that is what I would try if it were my machine - based only on the information you posted, which includes (on my part) the assumption that the burned VDR is identical to the other VDRs. Of course with a schematic or reverse engineering we'd be in much better shape to make a firm diagnosis, but lacking that you have to go with what is likely but not proven.
As you undoubtedly know (but others might not) you have to replace those bulging caps, too.
Good luck with the repair! Ed