Derek Cole breaks down three AC problem sources: the HVAC unit itself, ductwork issues, and building envelope gaps. Homeowners can inspect ducts in the attic for sagging, holes, or pest damage while a technician evaluates the unit.
It could be one of three things. It could be the unit, which was checked out, but that could be a problem. It could be the air distribution, which is the duct system. That could be a problem. Or the envelope, which is the home. That could be a problem. Now, you need to have a professional to look at all of them, but especially the unit. But what you can do yourself is to go check that duct system in the attic under the house I believe when Doug did this, he said the duct system was in the attic and he thought he was losing some cooling that way. Well, when they do a load analysis on that home, on that system, duct loss in the attic for heat gain, heat coming into the duct system, it's calculated. Now that calculation is different than if it was in the crawl space because obviously you have more of a heat load. If it's in the attic versus the crawl space. That should have been factored in in sizing the unit, the equipment, the duct system, so that shouldn't be a problem. Get someone to check your unit. You can yourself look at the duct system, just to randomly look at it, make sure no runs have fallen down, there's no big gaping holes where an animal or something got tore up there or the pest control guy did something. You can look at all that yourself.
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