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Following up. As with everyone else, a bad connector. Might be nice for
the Nest dev team to add some logic along lines of "if unit has been
working for some time and starts having this error, don't poiint to bad
wiring and instead point to a bad con...
+1 here. As with others, has been running fine for 1 year until today.
What I'm seeing not listed in thread above is that if I unplug the head
unit and reconnect, AC will start up fine but then 5-10 min later Nest
throws the same error again. Given i...