We have extremely dirty ductwork and a very dirty evaporator coil, which is throwing off air levels and pressure levels quite a bit. On the outside system, we have no filter dryer and it’s clear that there’s been oxygen that is coming into the system. It might not be from a leak, however, and the fact that the pressures are still high. It makes me think there might be no leak whatsoever. We just have oxygen in the system And we need to clean the air ducts and clean the evaporator foil to get a level pressure system so that we can recheck refrigerant levels afterwards. I would say this is our best bet moving forward because it needs to be done anyways, and it will potentially protect the system for years to come.