A common error that many drivers make is thinking that they must recharge their air-conditioning system every couple of months or so. This is simply a 'white lie' that somebody invented to try and encourage buyers to invest in refrigerants. In fact, you only have to worry about topping up your refrigerant every couple of years. We'd recommend starting to think about recharging your system around the two-year mark.
It's pretty difficult to identify if your car has a leak. A few things you can look out for is how your defroster reacts in the winter; if it isn't clearing fogged-up windows, this is a sign. But the number one most obvious sign that you need to top up is when your car's air-conditioning system only blows warm air.
[caption id="attachment_9642" align="alignnone" width="950"] Car AC Refrigerant[/caption]