LG Side by Side Error Code DH

[bwilliamsk9]

I have an LG LRSC26923SW refrigerator and I am now getting an error dh code showing up on the freezer door display.  It seems to be working ok as long as I disconnect power to reset the system.  I am reading that I need to replace the defrost sensor.  Does anyone have any advice, part numbers or service manuals for this unit.  I am confident I can replace what is needed if I know where the part is located.  Any help would be appreciated.

[Major]

Hi:  dH means defrost failed for some reason. Could be the heater, sensor or control board
this is a link to the manual.  Hope this helps
http://136.166.4.200/contents/Fridge/LRSC26923xx/LRSC26923xx_Owners_Manual.pdf