The customer said the a/c had stopped and the service people couldn't get there. After going through a few things over the phone, we went there within 3 hours.
Long story short: dirty air filter!
With a clogged filter, today's smart systems know there' a problem. The a/c coils were all iced over and the system kept the fan off to protect the motor.
With a cleaned air filter, a couple of hours of running the fan to warm and evaporate the ice frozen on the coils (futher restricting air flow), and the system was back in action.\
Another case of letting cooler heads prevail.
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