I currently own a Amana air command 80sse with a outdoor unit model #rcc36a2b that was installed approximately 1994. The system was having trouble cooling our house in northern Virginia, so we called out some folks to check it. The tech that came out checked for leaks and freon levels etc. He stated the previous tech charged the system wrong. He had assumed it was a piston chiller but the system was a TXV. So he filled it correctly and then when he opened where the chiller was he found a metal bulb was just dangling in the open space. He also fixed that and attached it to the line. It appears that had been that way prior to me owning the house (4-5 years ago). He started everything back up and it definetly felt cooler but still wasn't cooling the house down. He said it was possible the ductwork was poorly done since the previous owners changed it when the remodeled the house prior to us. Or that another reason might be the ac unit wasn't powerful enough. The vents also didnt seem to pushing a lot of air to me but he said it felt mostly fine to him. Our house was built in 1964 and is a 4 level but smaller maybe 2,500 sq ft? He checked the temps and said the system was running at its best possible and I should start considering replacing the unit. So fast forward 3-4 days and today the system is still unable to keep up. It's about 90 outside and inside its been set to 72 all day but never broke 78 degrees. I re-measured where he did and the temps read as below...
58 degrees from the supply duct
70 on the return duct
79 in the house
So I guess I'm wondering where to go from here. I think it would be foolish to just go and buy a unit. For all I know it won't make a difference because the ductwork is leaking everywhere or it's all the wrong size ducts etc. Do the numbers sound like it is pumping pretty good? Also he said they will stop making r-22 next year and I won't be able to have it serviced, was wondering if that is true.
Any recommendations on where to go from here would be greatly appreciated!