We had the same problem in our new home in Hillsborough. Galaxy wired the house so the Home Warranty Dept. sent them out. They replaced the Arc Fault breaker that was tripping, which did not correct the problem. So...... we called again. They came out and replaced the breaker with a "new generation" Arc Fault breaker, which was noticably different than the old one. That was 5 months ago and it hasn't tripped since. Interestingly, the breaker that was tripping was not the one for the refrigerator, but one several breakers away in the panel (living room outlets).
The electrician told me that they have seen many instances of this happening with the new Whirlpool refrigerators. He said they have also seen the problem in houses that are next door/near someone with a ham radio station. They are now making antennas that are integrated into flag poles, so there is no visible antenna to indicate a ham station.
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