Air condishing problems, Why won't my A/C cool my house down completely?

Question

My a/c works, it's central a/c w/ a gas furnice - but on really really hot days i'll have it set for like 72 and it won't get below 83 or at the most 79. On a regular day it works fine. My indoor unit is 1 yr old and the service guy told me my freeon levels outside are fine. Is this a maintanance issue? Could the vents inside the walls need cleaning? My house is 30 yrs old so i dunno... Sometimes the air doesn't feel very strong from some of the vents. Any suggestions would be greatly appriciated. Thanks

Answer 1

Sometimes the outside temperature is too high for the standard size of A/Cs installed. There is a limit to how much temperature difference you can get which is dependent upon the efficiency of the sealed area and the economics of over-sizing the A/C unit.

For instance, when the outside temp is over 105 F, you will need an over-sized A/C to effectively turn your cooled space into a freezebox
I can get about a 25-30 degree difference with my place because of a central A/C, a portable A/C, siding with insulation, and dual-pane windows..

Answer 2

If you've changed the filter(s), and the A/C guy said everything is fine, then you just have to live with it. Same thing happens with us. The house is just too big and there is not enough cold air. A new A/C unit would fix it, but is probably not worth it. The other thing you can look at is the unit in the basement to see if any cold air is leaking from it - if yes, insulate or tape with duct tape. Finally, make sure all your vents are open. Cleaning the vents doesn't usually result in better air flow (just cleaner air).

Answer 3

There could be several reasons for this. It may be a temperature control valve problem or regulator problem. There may be a problem also with the blower and it is not strong enough to force the air out properly. The size of the air conditioner may not be able to handle the size of the house as well. There are other things that you could do to aid the air conditioner in not working so hard. An attic fan works wonders. You may have to have the insulation checked too. It might be best to get a master HVAC technician out there to take a more well rounded look.

Answer 4

Vents may need cleaning. Coils may need to be cleaned also. Unit may be too small, or you could possibly have a hole somewhere in the duct work. Also if you don't have a lot of trees around you house and your house isn't very shaded you could put something on your windows to keep the heat out. Me and my husband bought some window tint for a car and never put it on the car, we put it on the windows on our house. We got the really dark Limo tint and you can see out and it still lets in some light, it just keeps out the heat and you can't see in the house from outside. Just a suggestion.

Answer 5

Sounds like your in the need of a professional duct cleaning

Answer 6

Check your filters. Do you only have 1 unit? Or more than one? IF you have a laser gage (thermometer) check your air temp coming out. What is it?

Answer 7

Maybe your house is not properly insulated.
Or your A/C unit could be too small for your house.

Answer 8

Too small a unit (evaporator/condenser) for the size of the house. Air handler is undersized for the amount of ductwork.

Too small of an education to write the question.
Condishing? It's CONDITIONING. FREON. FURNACE. APPRECIATED.

Answer 9

close the vents in rooms you dont use much thatll help alot

Answer 10

ac to small need bigger unit