As heat waves push temperatures well into the triple digits across much of the U.S., homeowners are flooding HVAC companies with the same urgent question: Why isn’t my AC keeping up?
The answer, more often than not, isn’t a broken unit—it’s everyday issues that are easy to overlook but simple to fix. In most cases, there’s no need to panic or prepare for a major system replacement. With a few quick checks, many cooling issues can be solved without calling in the pros.
Here are five common culprits behind weak AC performance—and what you can do to stay cool during the hottest days of the year.
5 Ways to Help Your AC Beat the Heat
1. Replace the air filter.
A dirty or clogged filter is one of the top reasons for poor airflow. It makes your system work harder and can reduce cooling efficiency dramatically. If it’s been more than a month or two, it’s time for a change.
2. Block out the sun.
Open windows and direct sunlight can quickly turn your living space into an oven. Keep blinds or curtains closed, especially on windows that face south or west, to reduce heat gain during peak hours.
3. Time your appliance use.
Using ovens, dryers, or even dishwashers during the day adds unnecessary heat indoors. Shift cooking and laundry to early morning or evening hours when outside temperatures are cooler.
4. Maximize air movement.
Ceiling and standing fans won’t lower the room temperature, but they can make you feel cooler by improving air circulation. Use fans strategically to create a wind-chill effect and take some pressure off your AC.
5. Inspect the outdoor unit.
Your AC’s condenser sits outside, often exposed to leaves, dust, and debris. If airflow around the unit is blocked, it can’t expel heat effectively, which reduces performance. Clearing away plants or cleaning the coils can help restore function quickly.
If your system is blowing warm air, leaking water, turning on and off frequently, or showing any kind of warning light or code—it’s best to get a technician involved. Ignoring these signs can lead to more serious (and expensive) damage down the line.
A new wave of global HVAC manufacturers is gaining traction in the U.S., offering compact, energy-efficient systems with smart controls and streamlined installation. Still, longtime market leaders like Trane, Mitsubishi Electric, and Daikin remain strong contenders, each offering advanced systems designed to handle extreme heat while keeping energy costs in check.
We’ve seen portable units on sale in hardware stores such as Best Buy; they might be best for renters so you can take your unit between homes. The problem is storing them in the winter.
