On Sunday, July 2, 2017 at 11:25:35 PM UTC-4, Sherlock.Homes wrote:
disconnect. Decided that it needed a recharge anyway so I'm calling the
HVAC folks tomorrow.

S

refrigerant does not get used up.

If it needs a recharge, it has a leak. Fix the leak.

(or it wasn't charged properly in the first place. But the leak is likely.)