Product review (5 stars): Refurb board or a cheaper answer
I ordered a refurbished unit from part simple for $99. That is nice as they recycle your dead one to refurbish as well.  I installed it in 25 minutes. The wiring problem is that there are connectors that have no wires. Thus yes, a good idea to take a photo before disassembling. I followed the video on youtube. It was pretty easy, just moving one cable at a time. The cables are keyed, so if it doesn't fit it may be in the wrong slot. Make sure cables are fully seated. If you can see the keying fins it is not fully seated. Also double check that all cables are seated even after it is in.
If you are handy, cheap, good with soldering circuit cards, you can just order the relays on the card and refurbish it yourself. My opinion, as an EE, is that the main thing that wears out are relays. This board has 8 relays soldered on the card. The relays are all Omron G5Q-1A4 12VDC. They are $1.99 on Amazon plus shipping. However.... Each relay has 5 pins, so that is 40 pins to unsolder and then resolder. You probably need solder wick or a solder sucker to prevent damaging the multilayer board.(A $21.91 attempt.. Tell it here if it works). If your install fails you can get the refurbished card.
David
PS
Ran 1 load works good so far.