Just tried to replace the main board in a Whirlpool S20BSRB21 A/G and get alarm and CC flashing on the front LED’s. It has had one rear board about 5 years ago, a front board 3 years ago and also the capacitor mod on the rear board a few years ago.
The clicking has just started again and the ice maker has stopped (tried replacing both sides of the IR sensors already) so I thought I’d try a new main board.
The origonal board is part no 481 2440 79019 and the replacement is 481 2217 78213. Every site I’ve looked at says they are equivalent and indeed it is the only board I can find. Any one know what the fault code means? I am assuming the new board is faulty but I remember something about having to replace the front board as well in certain circumstances.