Ask Angi: How can homeowners keep their air conditioner running efficiently this summer?

As temperatures rise and summer settles in, many homeowners are relying on their air conditioning systems more than they have in months. But after sitting relatively unused through cooler seasons, air conditioners often need a little attention to perform at their best.

The good news is that a few simple maintenance steps can help homeowners stay comfortable, improve energy efficiency and potentially avoid costly repairs during the hottest stretch of the year.

One of the easiest and most important places to start is replacing your air filter. Dirty or clogged filters restrict airflow, forcing your air conditioning system to work harder to cool your home. That added strain can increase energy bills, reduce cooling performance and shorten the lifespan of your system over time. Most homeowners should replace filters every one to three months, though homes with pets, allergies or heavier AC use may benefit from more frequent changes. If you can't remember the last time you changed your filter, now is probably the right time.

Homeowners should also pay attention to the outdoor condenser unit, which plays an important role in keeping air circulating properly. Leaves, grass clippings, dirt or overgrown landscaping around the unit can block airflow and reduce efficiency. Giving the unit at least a couple feet of clearance and clearing away debris can help it run more effectively during periods of heavy use.

Inside the home, small adjustments can also make a meaningful difference. Make sure vents aren't blocked by furniture, rugs or curtains, and pay attention to how evenly your home is cooling. Rooms that suddenly feel warmer than others, weak airflow, unusual noises or a system that seems to run constantly may be early signs that your air conditioner isn't operating as efficiently as it should.

Air conditioning has a way of struggling at the least convenient time usually during a heat wave when you need it most. It's one of those home systems many of us don't think about until there's a problem, which is why a little preventative maintenance before peak summer temperatures can go a long way.

For homeowners looking to maximize efficiency, it may also be worth considering a programmable or smart thermostat. Setting temperatures slightly higher while you're away and cooling the home when needed can help reduce energy use without sacrificing comfort. Sealing drafts around windows and doors or adding insulation can also help keep cool air inside and reduce strain on your system.

Scheduling an annual HVAC maintenance visit is another smart step, especially before temperatures peak. A skilled pro can inspect refrigerant levels, clean coils, test components, and identify small issues before they become bigger and more expensive problems. Seasonal maintenance visits often cost far less than emergency repairs during the height of summer.

Your air conditioning system works hard to keep your home comfortable during the hottest months of the year. Taking a little time now to help it run efficiently can make a meaningful difference in comfort, energy costs and peace of mind all summer long.

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Tweet your home care questions with #AskingAngi and we'll try to answer them in a future column.

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This story was originally published June 15, 2026 at 1:38 AM.