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Our house was built about 7 years ago. We have had an existing problem that when the temp gets above 95 the house will not cool below 82. Every year we have it serviced and they add coolant. It gets a little cooler but never cold. We have asked if the system is designed right and have been told repeatedly that the size and configuration should be adequate.

The last guy that came out stated that we needed an automatic fan in the attic because we had so much attic space and it was trapping the heat and making it impossible for the house to cool. I really have no idea where to go from here I just want the house to be at 77 to 78. Has anyone had this problem and did the automatic fan in the attic solve it...
 

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Try a new service company. Ask for a load calulation to be performed and presented to you so you can know once and for all if you have correct capacity equipment installed.

Weather or not the equipment you have installed is operating properly is an entirely different issue.

Summary:
1. need to know proper size equipment needed
2. need equimpment that is operating properly
3. roof venting may be needed...ridge vent, power vents, etc

Bottom line is you should be able to have a system that can have your home in the 70's even on 100 degree days...assuming you don't do huge setbacks and expect the system to be able to "catch up" on a worst case day.
 

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Yup, you need a proper calc done to see if your unit is sized right. I bought a new home in New Orleans years ago in a subdivision - the builder used the same unit for several floorplans, irrigardless of size. Folks with larger floorplan had the same problem - house would not cool on hot days. Builder ended up replacing several dozen units for larger.
 

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Yup, you need a proper calc done to see if your unit is sized right. I bought a new home in New Orleans years ago in a subdivision - the builder used the same unit for several floorplans, irrigardless of size. Folks with larger floorplan had the same problem - house would not cool on hot days. Builder ended up replacing several dozen units for larger.
Its not the size it could just be some simple steps.
1. Get a water hose and rinse the outside coil and touch the thich pipe outside it should be cold or put your hand on top of the outside unit where the fans throws air it should throw hot air. If you can go inside the attic open the furnace where the coil is and wash it with the water hose. Turn off t-stat and breaker power when doing this. clean coils make the difference.
2. Replace the air filter inside make sure you put it the correct way.
3. Go to the thermostat put it to off wait till it turns off. If it has batteries take them off. Open the t-stat where you can see connection windings. Unsrew the red connection in the t-stat and remove it make sure it doesn't touch anything. After you take out the red winding wait 3 minutes and put it back where it belongs. Replace new batteries and close your t-stat. Turn it on to auto and cool and wait till comes on.wait 15 minutes and check the thick pipe outside it should be cold and the fan. If it doesn't work the there's is a leak somewhere call a technician. And it is not the size ac unit technicians and companies will tell you that to sell you new equipment don't listen to them.always call small hvac companies or someone you trust. Thanks
 
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