Derek Cole explains why your AC might not cool to your setpoint on extremely hot afternoons. When it's 97°F outside and you want 70°F inside, a few degrees shortfall around 4-5 PM is normal due to solar load. Wait until after sunset to check if it reaches your target; if not, call a professional.
If it's 97 outside and your home is set to 70 and your home is not getting to 70 on these really hot days at 4 or 5 in the afternoon, it's not necessarily broken. 4 or 5 o'clock is probably the hottest time of the day. So people get home, they freak out, the temperature's not coming down. Give it till dark. Once it gets dark, once that load comes off the home, once the sun comes down, it should get back to set temperature. If it doesn't, then you have a problem. But at 4 or 5 o'clock, if it's a few degrees off and it's a hot day, give it till dark. If your system gets up at dark after a hot day, it's probably doing what it should be doing. But just in case Make sure you have that system checked, have it maintenance. Make sure you're doing everything you can to be preventative in what's going on with your system. If it doesn't, your system needs to be checked out by a pro. And always get a maintenance, get it tuned up, get it clean, get it checked. So this time of year when it's hot and humid, those Things come and go. You're ready for the worst-case scenario, and your system has a fighting chance.
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