Summer FAQs: BEST AC PRACTICES

When summer settles into our region, it does not arrive politely. It shows up hot, humid, stormy, and ready to make your air conditioner work overtime.

Across this region of Western Kentucky, Southern Illinois, Northwest Tennessee, and Southeast Missouri, summer HVAC performance is about more than comfort. It is about humidity control, energy efficiency, storm readiness, and preventing a mid-season breakdown when the heat index is climbing.

Triangle Heating & Cooling is answering some of the most common summer HVAC questions homeowners ask, along with a few local tips for keeping your home cool through the heat, humidity, and unpredictable weather patterns of our area.

Why is my energy bill higher in the summer?

Higher summer energy bills are common because your AC runs more often. However, a sudden or extreme increase may mean your system is working harder than it should.

Common causes include:

● Dirty filters

● Low refrigerant

● Dirty coils

● Poor insulation

● Leaky ducts

● High humidity

● Aging equipment

● Thermostat settings that are too low

Triangle Tip: If your bill jumps but your comfort does not improve, your HVAC system may be losing efficiency. Triangle Heating & Cooling can inspect your system and help identify where energy may be wasted.

How can I help my AC keep up during local summer heat?

A few simple steps can make a big difference:

● Replace or clean your air filter regularly

● Keep blinds or curtains closed during peak afternoon sun

● Use ceiling fans to help circulate air

● Keep the outdoor unit clear of weeds, grass, leaves, and debris

● Avoid running heat-producing appliances during the hottest part of the day

● Make sure supply and return vents are open and unobstructed

● Keep the thermostat steady

● Schedule routine HVAC maintenance

Triangle Tip: Your AC should not have to battle your home. Good airflow, proper insulation, clean equipment, and consistent thermostat settings all help your system perform better.

How often should I change my air filter during the summer?

During summer, your air filter should usually be checked once a month. In many homes, especially those with pets,allergies, heavy dust, or high system use, the filter may need to be replaced every 30 to 60 days.

In our region, summer brings more than heat. Pollen, grass clippings, dust from dry spells, and debris stirred up by storms can all impact indoor air quality and airflow. A dirty filter makes your HVAC system work harder, which can increase energy bills and put unnecessary strain on your equipment.

Triangle Tip: If your home feels warmer than usual or your airflow seems weak, check the filter first. It is one of the easiest and most affordable ways to help your system breathe.

What temperature should I set my thermostat to in the summer?

For many homes, a good summer thermostat setting is around 76 to 78 degrees when you are home. If you are away during the day, raising the temperature a few degrees can help reduce energy use without sacrificing comfort.

The key is consistency. Dropping the thermostat dramatically does not cool your home faster. It simply makes your system run longer.

For homes in Western Kentucky, Southern Illinois, Northwest Tennessee, and Southeast Missouri, humidity plays a major role in comfort. A home set at 76 degrees with controlled humidity can feel more comfortable than a home set lower with too much moisture in the air.

Triangle Tip: Keep your thermostat steady and use a programmable or smart thermostat when possible. Avoid major temperature swings during peak afternoon heat.

Why is my AC running all day?

On very hot days, it is normal for your air conditioner to run longer than usual. However, if your system runs constantly and your home still does not feel comfortable, there may be an issue.

Common causes include:

● A clogged air filter

● Low refrigerant

● Dirty coils

● Leaky ductwork

● Poor insulation

● High indoor humidity

● An aging or undersized system

In our region, long stretches of heat and humidity can push HVAC systems hard. Add in hot attics, older ductwork, and direct afternoon sun, and your AC may be fighting an uphill battle.

Triangle Tip: If your AC is running nonstop and still not keeping up, do not wait until it quits completely. A service call can often catch a small issue before it becomes an emergency repair.

Why does my house still feel sticky even when the AC is running?

Humidity is one of the biggest summer comfort issues in our area. When the air is heavy with moisture, your home can feel warm or sticky even if the temperature on the thermostat looks normal.

Your air conditioner helps remove humidity as it cools, but if the system is oversized, aging, low on refrigerant, or not running properly, it may not be removing enough moisture from the air.

Another common mistake is leaving the fan set to “On” instead of “Auto.” When the fan runs constantly, it can blow moisture back into the home after the cooling cycle ends.

Triangle Tip: During humid summer months, set your thermostat fan to “Auto” instead of “On.” If your home still feels sticky, it may be time to have Triangle Heating & Cooling check your system’s performance and humidity control.

Why are some rooms hotter than others?

Uneven cooling is a common summer complaint. One room may feel cool while another feels warm, especially in homes with second floors, additions, bonus rooms, older ductwork, or rooms with strong afternoon sun.

Possible causes include:

● Blocked or closed vents

● Dirty filters

● Leaky ducts

● Poor insulation

● Inadequate return air

● Sun-facing windows

● Unbalanced airflow

Triangle Tip: Before assuming your system is failing, make sure vents are open and not blocked by furniture, rugs, or curtains. If uneven temperatures continue, Triangle Heating & Cooling can evaluate your airflow and ductwork.

Should I close vents in unused rooms?

It may seem like closing vents in unused rooms would save energy, but it can actually create pressure problems inside your HVAC system. Your system is designed to move air throughout the home. Closing vents can restrict airflow and make the equipment work harder.

This can lead to reduced efficiency, duct leaks, frozen coils, and added strain on the system.

Triangle Tip: Instead of closing vents completely, talk with a professional about better options like zoning, duct improvements, insulation upgrades, or thermostat adjustments.