Why does cold air blow out of our cold air return? It's closest to the floor. Diane A.?

Question

Our maintenance men have worked on our A/C unit 7 times in 10 days. It either doesn't work, blows the circuit breaker, and now it' s blowing cold air out of the cold air return.

Answer 1

First if air is blowing out of the return, turn it off.  Somehow the fan wheel would  have to be turning backward which unless you have a commercial 3 phase unit or your unit is belt drive and they have the pulleys completely screwed up, I cannot explain.  Call another service company.  There is no way that should not have been able to find the problem in 7 trips.