Product review (4 stars): If your not comfortable doing this I'd suggest you use a pro
This little thing works as it should, but depending on your fridge it can be a hassle to put in. On some units you may have to remove the defrost heating element (remove the rear panel in the freezer, always unplug the unit when doing anything) etc. If your not comfortable doing this I'd suggest you use a pro, otherwise it's pretty easy. You do have to cut the current two wires and splice this unit to them. Be sure to use the correct connectors and put some sealant in the connector to close it up and prevent any condensation from getting to the wires. Good luck and save your self a bunch of bucks..  .