Basically, if it's your fridge, and you are a DIY'er, put in a fuse, and see what happens. Of course, now that the voltage spike protection circuit has been weakened, the next spike might not get dissipated, and it could damage board components the second time around.
If you are a professional, replace the board, because you have no real way of knowing what damage has happened, and paying customers really hate dealing with the hassle of call-backs.
American power line voltages are so well regulated, most of us only experience one or two serious household voltage spikes in or lifetime. The fact you don't get call-backs within your warranty time has a lot do do with reliable American power.
If this appliance was in Mexico, it wouldn't last a year! (yes, I have seen this happen many times) Down there people put UPS power supplies, and surge protectors on expensive electronics.