Help with my Trane air conditioner!?

Question

My house won't get cooler than 75 degrees when it is 85 or hotter outside. Cold air is coming out of my vents, but how do I check to see if my air conditioner is working properly?

Answer 1

Check your filter.
Check your duct work.
Have a blower test performed.
Have a tech check freon level.

I am assuming your return air vent is not obstructed, and is big enough for you unit size.

Answer 2

There are many answers to this question.
1. The quantity and cfm(cubic feet per minute)of air is a possibility. i.e. The fan isn't blowing enough air across the cooling coil to extract the heat from your house.
2.Normally if the temperature of the air supply & the air returned to the coil is less than 15 degrees F. the condensing unit is underachieveing or needs attention
3.It's hard to stop a Trane and if it is properly sized for your home there is generally the condensing unit cycling of and on to quick which does not give it a chance to remove humidity or reduce the temperture in your home.
Therefore, if the unit is oversized ti starts & stops to quickly, & if it is undersized it runs & never cycles to cool down the house.
4. The fan or blower may be undersized & does not deliver enough air..

Answer 3

If you've ruled out 'lack of good insulation,' clean filters and freon,
and you think it's the A/C, mine quit cooling when it was humid out and cooled off outside at night, it didn't have to be so hot; the coils would ice over and block the airflow, and it would run all night but not dehumidify and cool enough.
The problem was the coils were dirty, and it wasn't enough to just vacuum; plus I couldn't get to all parts of them.
I called Aloha, and he came and cut out the coils by sawing copper pipes and unscrewing it, took it outside and put this foam cleaner in there and let it work, then he sprayed it clean
with the garden hose. Put it back in and it worked for 5 or 6 more years.
Another common problem is the drain pipe (mine is pvc and goes outside and water drips out) can get clogged and has to be cleaned out. I don't hink that's your problem unless the floor is wet around the inside unit.

Answer 4

I assume your unit is not running constantly. If everything is working correctly you may need to add insulation to your home. In the attic is the most common place to add insulation.
The sun's heat radiates down and heats up your roof. This heat is transferred into the rest of the house. If your house is well insulated, this heat cannot reach the inside of your house.
This will save you money and you will get more efficiency out of your system. The cold air will stay inside and the hot air will stay outside.

Answer 5

there are a lot of good answers here and I would like to add one more. HVAC units are sized in a house according to the square footage of the house, what is the linear footage of the walls that faces east,south, ect. what type of windows, what size of windows and which direction do they face? what type and how much wall and attic insulation? some HVAC contractors will have computer software that can figure this out and tell you what size furnace and a/c you need and it will tell you how many cfm's are needed in each room which will also tell you if your duct work is sizes right. hope this helps.