This whole question about connecting the gauges. So, it will tell you if you have a leak. If the leak is small your system will still run but eventually it will start blowing hot air. So if you know you have speak you can fix it before the whole system fails. Also, without checking the pressures, super heat and sub cooling with the gauges there is really no way to know if the system is running efficiently or if there is something else wrong. But as I mentioned if you have or get a carrier variable speed system you can get all this data from the app or the thermostat without connecting up gauges. The newer small wireless gauges don’t loose much Freon anyway but you are right. Why loose any at all.
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