Quote Originally Posted by dirtrulz View Post
If it works and is blowing cold why would it need a refrigerant top off. Take the top off the outside unit and clean the leaves and garbage out, wash out the coils.
^^ This is the most overlooked maintenance item for home and business HVAC. 5-10 minutes hosing off the condensor / coils, removing that accumulated dirt and leaves makes a big difference in operation.

Of course an annual check of your HVAC system can save you $$$ in the long run.