While performing maintenance on this AC and furnace, I noticed that the refrigerant levels were low after washing. The unit levels were still low. I removed the filter and made sure we had the correct amount of air going through the system which we do and we’re still low meaning there’s probably a small leak somewhere. We need to add refrigerant and some kind of leak seal with the UV Dye so that we can figure out where this leak is. If we can’t find it that way we need to do a leak search.