Another ac thread

[iceman]

How are you checking pressure? When the system is off the you could lose a couple pounds of refrigerant almost to nothing before the pressure will drop. Pressures will stay at whatever ambient converts to on a pt chart. The best way to verify no leaks is with the system empty, fill it with dry nitrogen as that has minimal pressure temperature change and make sure the pressure doesn’t drop. If it does, find the leak with soap or introduce some refrigerant and use a leak sniffer. They actually work fairly well but should be used in a shop with minimal breeze. A system with a leak will be a never ending problem. Also, Fan cycling has mainly to do with High side pressures.