Okay, here’s the short story since I’m working on this problem on another board as well.
My evap fan stopped working, after doing some tests I decided it was either a bad fan, bad motherboard or both. I replaced both and I’m still getting the same problem.
Now, this fridge has a test mode which, amongst other things, forces the fan to turn on.
When I put it in test mode, the voltage at the source reads 16v (which should be the correct voltage to run the fan), but, when I plug the fan in (and it’s not spinning), the voltage drops to about 2.5v.
In fact, with the fan plugged in, the voltage will start cycing from 2.5 down to 0, then it’ll jump back up to 2.5 and fade back to zero.
Any thoughts on this? What would cause that much of a voltage drop when a load is attached?