Measure the temperature of the air coming from the AC. It should be about
20 degrees cooler than the air going into it. Example, house is 80, air
coming out of close duct to unit should be about 60. Good to do this both
for your AC and furnace when they are in good working order, assuming a
central air system.

"Buck Turgidson" wrote in message
...
I have a Carrier AC unit from about 1997. Being that it is 95 degrees here
in the mid-Atlantic area, the unit seems to struggle to keep the house
cool. It used to work better, even in hot weather like this.

Does this indicate that it has lost coolant? Any idea of what I should
pay to have it re-charged?