Air Conditioning - Air Temp from A/C vents

Took air temp from closest vent to the a/c unit and it reads 57.4 and won't get any lower. Does that temp sound about right for how cold the air should be? This temp was taken with the thermostat set at 76 and it was 85 outside. Just doesn't seem like the house cools down good at all.

What is the difference between the temperatures at the return air filter and that vent?

That is the test. Not how cold it gets but how much it reduces the temperature.

Will check later today and post back.

77 degrees at the intake vent and comes out at 58 degrees is this about right?

that's pretty good. 20 degree drop is the benchmark.

Ok cool, I guess the house's insulation pretty much sucks then.

..or close your windows!:p

The air coming out of my vents is 52, but i have the same problem. The damn house just doesn't seem to get cooled! It's warm and humid out (about 82 right now in south florida) even though it's 11:00 here. The house tstat says 78. It's been like that the whole day and it won't go down (my room, which gets cooler, is about 75).

Are power attic fans worth the money or do they suck more electricity than they claim to save?

The air coming out of my vents is 52, but i have the same problem. The damn house just doesn't seem to get cooled! It's warm and humid out (about 82 right now in south florida) even though it's 11:00 here. The house tstat says 78. It's been like that the whole day and it won't go down (my room, which gets cooler, is about 75).

Are you closing your blinds to not let in the sun? Each normal size window can let in about 5000 btus of heat. And being you are in Florida...I hope some yankee builder didn't come down there and think that in Florida they don't need insulation in the house.

Both of you : Are you leaving the stat at one set-point or are you using a programable and letting it shut off at times during the day ??

I just set it to keep the house at 76.

So you keep it set at 76º and the return air temp is 77º ?

How often does the outdoor unit cycle, In say and hour ??

I would quess that what we are talking about here is a noticeable change in unit performance from past history. Assuming here that there where no changes made to the structures/duct system etc. the unit performance has decreased to the point where the homeowner can tell the difference? We are all aware of AL Gores global warming theory, but I think the timing might be a bit quick in this case LOL (he does NOT like Florida by the way, for some odd reason hmmm) Lets first do a thorough cleaning of the evaporator and condensor coils then have a AC pro come out and check airflows and set the refrigerant charge using the superheat/subcooling method, normal performance should be returned barring accelerated global warming.