Hi all. Weird thing happened to my HVAC system toward the end of summer. All of a sudden one day my outside a/c unit stopped shutting off when my blower on my air handler shut off. I kept an eye on it and noticed that no matter how hot it was outside, how long the air handler ran as well, the outside unit stayed on constantly. I started having to shut it off at my breaker box otherwise it would still be running as i'm typing this. The thought crossed my mind that it was just the fan running too but i noticed one day that my lines from the outside unit that run into my air handler had frost on them! Obviously had been running for some time and was the compressor running as well. Thoughts???