Defrost not working

My Samsung refrigerator model #RF263TEAESR/AA is leaking water and pooling under the deli tray and even had some ice on it. So I unplugged the appliance and let it defrost then took it apart as as Appliance Video.com instructed. I disconnected the wires on the top right as the video showed and removed the thermostat wire and sensor. Then the video directed me to the left side. There is a connection for the defrost heating element and I only unplugged that. The video instructed me to then remove the bi-metal however, my refrigerator does not have a bimetal. It has the plug but it just loops back into itself with a red wire. Does this mean that it has no need of a bi-metal anywhere? my refrigerator has the numbers 07 in the corner of the data tag if this helps.

Thank you,
Jack