Product review (5 stars): Perfect replacement
I was concerned about purchasing an aftermarket replacement part but this part is well made and works perfectly.  The back side of the original board has a conformal coating to protect it from moisture and so does the replacement.  I received both the receiver and emitter boards, each sealed in an airtight antistatic bag with a silica gel desiccant pouch.  I only needed and installed the receiver.  The circuit boards came in a box labeled Supco ADC9102 Replaces Whirlpool 4389102, Made in China.  Supco is a very old and reputable parts manufacturer.  If Supco didn't make this in their own factory, they certainly chose an excellent supplier.  I repair a lot of appliances and have an account with a local parts supplier where I receive wholesale prices but this was cheaper than what I could buy locally.  Why would I spend a lot more for a Factory part, it was the Factory part that failed.