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6,939 posts, read 14,647,658 times Originally Posted by d4g4mNot sure if he checked that. FYI our unit is not a heat pump; we have AC and a gas furnace. FYI, it wasn't as hot last week and our unit seemed to work fine. Apparently, we only have this problem when the outside temperature is at least 110 degrees. I would expect our units to work fine up to at least 120 degrees, considering our other unit never had this problem. We replaced our filters last month. As stated, the technician checked for issues with airflow, and he didn't seem to find any problem in that regard. The refrigerant line doesn't appear to be frozen, so I don't think airflow is the issue. However, I do know that the zone that this particular unit cools does generally tend to be warmer than the other zone; in the winter our furnace for the other zone does tend to work harder than the one for the zone that we are currently having trouble cooling. 8,925 posts, read 33,192,515 times Originally Posted by Pink Jazz

I can expect a lot of things outta just about anything- but realistically I KNOW that isn't going to happen. From your description I'd say, yeah there's probably nothing wrong with your A/C system. I'd look at other things like attic ventilation, attic insulation, windows (directional placement and U-Factor), roof color, placement of condenser unit/airhandler, and general construction details. home air conditioner compressor warrantyAll of these things can effect the efficiency of a climate control system.window ac units with heat Well, our home is an Energy Star certified home, and we never had this problem in previous summers from what I recall. air handling unit location buildingWe have Low-E vinyl frame windows, R-30 loose-fill Owens Corning Pink fiberglass attic insulation, and R-19 composite cellulose wall insulation.

Our house also has a Louisiana Pacific TechShield radiant barrier, which many experts consider to be more important than insulation in our climate. Our house is oriented north-south (front facing south), which is generally considered to be superior to an east-west orientation in terms of energy efficiency. 4,887 posts, read 4,691,677 times 3,632 posts, read 7,233,261 times Yours is a builder grade Puron unit. You have to be careful when specing the size of the units as Puron units in high heat areas lose efficiency when the temps go over 105F. The critical point for Puron is 158.4F which means it no longer works at all compared to Freon R 22 of 208.4F. The issue as I see it is the unit was sized too small for your heat. A 5 ton unit can be reduced quickly to the capacity of a 3 ton. It sounds like yours just can't keep up with the high heat. I've had Carrier units before, had them on my personal office building. They were a joke and soon got replaced with Ruud units. Ruud is all we install now as the units come with a great warranty and they just work without having any issues.

Might consider hanging shades on the outside of the house to kill the radiant heat on the walls, specifically the west wall. FWIW, we have the high heat here as well. It's not uncommon for the thermometer to be pegged at 125F. The wife keeps our Ruud unit at 70F inside the house. I call it "hang meat temperature". The unit cycles off and on about every 20 minutes. I can't imagine how low the temp would go if it was running non-stop. Originally Posted by Rabrrita The problem zone is in the southeastern part of the house. Our AC units are on the west side of the house. Carrier is the world leader in high-technology heating, air-conditioning and refrigeration solutions. Carrier heating and air-conditioning systems are trusted to bring energy-efficient, quiet, consistent comfort to millions of people at home....Need a NEW System? Click Here to Schedule an Estimate! Whether you’re looking to install an air conditioning unit in your home or business, Efficiency Mechanical promises to provide skilled, dependable, and expedient service.

Carrier IAQ and Air Conditioning units help you control air moisture, and bring cool, fresh air into your home. No matter what type of fuel or heat source your home has, there’s an innovative Carrier gas furnace or oil furnace for you. Our service technicians are certified and actively participate in training to maintain the highest standards of the industry. Efficiency Mechanical has service Air Conditioning technicians available  7 days a week for emergency service. We offer AC tune-ups, heating repair and standard service calls Monday through Friday from 7am to 4pm. Our service technicians are certified and actively participate in training to maintain the highest standards of the industry. We do not charge by the hour, we charge by the job. No matter how long it takes to do a job for you, you will know the price you are paying before we start the work. This saves you money and time and takes the guess work out of having your air conditioning repaired.