Do you mean that your heat pump stopped pumping cool air, so you decided to clean it, and now the control board is showing a blinking green LED?
Since different manufacturers use different colored LED's, different error codes, dont you suppose that Size, Make, Model Number, Version, Serial Number, and board SN would help, along with where you live?
Pictures help a lot too because some of the guys here are really sharp, and know a unit on sight.
These Forums never cease to amaze me. :blink: