Goodman split unit that heats instead of cools

Question

I have a Goodman CPLE24-1C air conditioner that is remotely connected to a Janitrol AR24-1 (Goodman HKR-05) air handler. The unit cools very well for the first 30 to 45 minutes. Then it starts sending hot air out the air vents and the fan on the outside unit moves very slowly and the outside unit is hot enough to burn you if you touch it. Any ideas?Thanks Mark