ac froze up when fan on low speed.
Exactly twice my a/c has frozen up.Once last year and just this weekend. Both times it was very hot and humid and the unit ran all day trying to keep up and at some point the fan speed was set to low...
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My friend who is a mechanic, told me to never regulate the ac with the fan speed. Always keep the fan turned up high and adjust the temp control to regulate temp. He warned me if I turned the fan down it could freeze up the ac unit. Guess he was right.
