no jokes please. why wouldn't a window unit take a charge ? been working on them for 4 yrs. and never had this happen. i usually charge the low side with a fitting that meters the liquid. sometimes it wont take it all but i can put the rest in the high side. I just changed the compressor and no burnout, so the system should be clean. They are 15 year old Climatemasters. Charge is 2 pounds