I am up here in the great NE of Upstate NY. Cold winters, sometimes hot summers. I am retiring a 1961 manufactured Intl Air Cooled Air Conditioner, by now apparently defunct Intl Heating Company of Utica. An expert found the condensing fan is not functioning properly, bearings presumably going/gone, drawing too much amps, when it is on for while, buzz sound, still delivers cold air, but fan outside stops. Specs say it uses R22/Freon. It is a big one, 46K BTU, I think that means Four Ton We have been here with the Unit since around moving in around '81, 3 BR ranch built I think in 50s. I need your input please, thanks. I am reading about Freon/R22, PuronR4-10A. I am considering some possible Freon/R22 outside Units. This whole issue is confusing to me somewhat. The entire outside Box needs to be replaced I am told, as they dont manufacture these Intl Condenser Fans anymore, the compressor appears to still be good. Units may include Goodman, Amana. So at this time with the issue of Freon and Puron, can I do well until at least 2020 (when Freon will still be there recylcing but no longer manufactured) with an outside Box that uses Freon/R22 and no need to replace anything else inside the house in or around the Box in the basement? Or is replacing the outside brains of the Central AC at this time with an albeit efficient about Four Ton AC Box with Condenser Fan and Compressor not the optimal move given that our nation is in the process of this Air Conditioning conversion from Freon to Puron? If we want a Puron Machine, instead of a Freon/R22 outside Box, would we also need to have replaced the Refrigerant Lines? I hear Puron uses higher pressure, would other inside components need to be replaced. I read somewheres that copper Freon/R22 lines cant ever be entirely cleaned and must be replaced if moving from Freon/R22 to Puron/R4-10A. If we go with a Puron Machine, do other things inside the house need to be replaced in the Central AC system? I read in either case, if you put a new Box outside (with condenser fan, with condenser etc) you should consider having inside Box in the basement have the coil inside replaced? Is this correct, and if so, why? I also noticed, the local hardware store did not have an air filter that thing with the blue mesh that fits the inside Box down in the basement. Are there places one can go to to get the exact sized air filter to slip in on old machines even like the '61 that I have downstairs Any informational assistance is greatly appreciated. Many thanks from GuruMan in Upstate NY GuruMan

I have a problem with the heat and AC both not working. Is my first option to replace the t-stat? I checked the fuses and replaced the filter.