Ordered replacement air damper control assembly from AppliancePartsPros, which arrived the next day. The new assembly included the wiring harness, so it was a straightforward exchange. Two Phillips screws hold the assembly in place. After removing them and the styrofoam cover, disconnect the wiring plug and push the tabs on the right and left sides of the assembly. Remove the old part and replace with the new one. Reverse the steps and you are done. There is also a helpful video.