Keep It Cool: How to Maintain your AC in Summer

It’s the height of summer once again. As millions of Americans swelter under high temperatures, so too will millions of AC units be put to the test. Some units will break, others might groan and screech, and some will flat out refuse to work.

To make sure your AC does its job, we put together this maintenance guide to make sure your trusty air conditioner does its job throughout the summer season, no matter what kind of AC unit you have.

Let’s get started!

Why AC Maintenance Matters in Summer

Before we dive into the specifics, here’s why seasonal maintenance is so important especially during summer:

✔ Peak Season

July and August are the hottest of the year for North America, marking the highest usage of AC. You wouldn’t want your unit breaking down during the peak of summer!

✔ Energy Efficiency

According to the Department of Energy, home cooling accounts for 12% of the electrical consumption in US households, making it one of the largest sources of energy usage. In fact, this adds up to $29 billion annually for homeowners!

Dirty filters, clogged coils, and poor airflow force your AC to work harder, wasting energy and leading to higher utility bills.

✔ Comfort

Obviously, a well-maintained AC unit cools more effectively and evenly. It also provides faster cooling, and without annoying noises that might otherwise shatter the peaceful atmosphere at home.

✔ Longevity

Routine care helps prevent costly breakdowns and extends the life of your AC. Well-maintained units can last anywhere from 10 years all the way to 25 years, depending on the type of AC unit!

✔ Air Quality

Perhaps most importantly, clean filters and coils reduce the risk of allergens and mold formation, improving indoor air quality. This is especially crucial if your household has young children, elderly members, or people with allergies or respiratory problems.

Summer Maintenance for Different AC Types

1. Central Air Conditioning 

Central AC systems are common in homes and commercial buildings. Here’s how to keep yours running smoothly:

• Change or Clean Filters Monthly: Dirty filters restrict airflow and reduce efficiency.
  
• Inspect and Clean Condenser Coils: The outdoor condenser can get clogged with dirt, grass clippings, and leaves.
  
• Clear Debris Around the Outdoor Unit: Maintain 2–3 feet of clearance around the unit for proper airflow.
  
• Check the Refrigerant Lines: Look for signs of leakage or insulation damage.
  
• Clean the Evaporator Coil: Located inside the air handler, this coil should be cleaned annually.
  
• Check the Thermostat Settings: Ensure it’s working correctly and programmed for energy savings.
  
• Inspect Ductwork: Look for leaks, mold, or dust buildup, especially if some rooms feel warmer than others.
  
• Schedule a Professional Check-Up: Ideally before peak summer use.

---

2. Ductless Mini Split 

Ductless systems are one of the most efficient types of AC, but still require periodic upkeep to keep them performing at their best.

• Clean Filters Monthly: Indoor air handlers have washable filters; keep them free of dust.
  
• Wipe Down Indoor Units: Dust and vacuum vents to maintain airflow.
  
• Clean the Outdoor Unit (Condenser): Like central AC, keep the area around it clear of debris.
  
• Inspect the Condensate Drain Line: A clogged drain can cause water leaks inside your home.
  
• Check for Ice or Frost: This may indicate airflow issues or low refrigerant.
  
• Ensure Remote Settings Are Correct: Many mini splits have eco or dehumidify modes that can help manage summer humidity.

• Use Self Cleaning Features: Many units have built in coil cleaning functions that can help to keep the unit running its best. Check your manual to see if your unit can do this and how often it should be done.

For more in-depth information, check out our dedicated guide to Mini Split Cleaning and Maintenance.

---

3. Window Air Conditioner 

Window units are common for individual rooms and apartments. Proper care can keep them efficient and quiet.

• Remove and Wash the Filter Weekly or Biweekly: Dust builds up quickly during heavy use.
  
• Clean the Front Grille and Coils: Use a soft brush or vacuum.
  
• Ensure Proper Tilt: The unit should tilt slightly outward to allow condensation to drain.
  
• Seal Around the Unit: Check for air leaks that could let hot air in.
  
• Clean the Drain Holes: These can become clogged with dust and debris.
  
• Inspect the Power Cord and Plug: Look for signs of wear or fraying.
  

---

4. Portable Air Conditioner 

Portable ACs offer flexible cooling, but they need routine upkeep to work well.

• Clean or Replace the Air Filter Every 2 Weeks: Especially important if you have pets or allergies.
  
• Drain the Water Tank Regularly: Some units need to be emptied manually, especially in humid areas.
  
• Clean the Exhaust Hose: Dust buildup can reduce performance.
  
• Check for Hose Kinks or Air Leaks: These reduce cooling efficiency.
  
• Vacuum the Vents and Coils: Unplug first, then use a soft brush or vacuum cleaner.
  

---

5. Through-the-Wall AC 

Often used in condos and commercial spaces, through-the-wall ACs are similar to window units but built into the wall.

• Clean the Filter Weekly: Many models have reusable filters that can be rinsed.
  
• Inspect and Clean the Coils: Use a coil cleaner spray if needed.
  
• Check the Sleeve and Insulation: Ensure there’s no water pooling or mold.
  
• Vacuum the Unit Interior: Carefully clean dust buildup inside the unit.
  
• Test the Thermostat Function: Make sure it cycles on and off properly.
  

Practical Cleaning Accessories

Pressure washers:

SpeedClean SC-CS-100 CoilShot Condenser Cleaner

Clean coils quickly and conveniently with this highly portable attachment. It uses conveniently packaged CoilShot Tablets and a garden hose, so you won’t have to lug around bulky liquid gallon-sized containers. Simply attach the CoilShot to a garden hose, insert the tablet, select your foaming level and blast away the dirt and debris from the condenser!

For larger AC units:

SpeedClean CJ-125 CoilJet Coil Cleaner System

With a 125 psi spray and 0.6 gallon per minute water flow, this powerful washer offers the perfect pressure for cleaning coils without overwhelming condensate lines. It uses a 12V rechargeable battery pack making it completely wireless, providing up to 12 full tank loads of cleaning power per charge.

It is designed to work with all types of HVAC systems, including central systems, mini splits, PTAC units, refrigeration units, and rooftop and attic installations.

Also check out our extensive AC Maintenance and Cleaning catalog to handle all types of AC units!

---

HVAC Tips for Summer

🗹 Don’t Block Airflow: Avoid placing furniture or curtains in front of vents or units.

🗹 Use Ceiling Fans to Assist Cooling: Fans help circulate cooled air, allowing you to raise the thermostat slightly.

🗹 Close Blinds During the Day: Reduce solar gain to lessen your AC’s workload.

🗹 Use a Programmable or Smart Thermostat: Helps save energy while keeping your space cool.

---

When to Call a Professional

You should contact a licensed HVAC technician if you notice:

• Warm air blowing instead of cold
• Unusual noises or vibrations
• Water leaks from the unit
• Persistent odors
• Ice buildup
• Skyrocketing energy bills without explanation

Regular tune-ups by a professional can catch issues early and ensure your system is ready for the hottest days.

---

Keep Cool with Total Home Supply

Whether you’re using a portable, mini split, window, or central air system, we have the AC cleaning tools and products you need to keep your air conditioner in peak shape. From cleaning solutions to pressure washers designed specifically for coil cleaning, we’re your one-stop shop for summer AC maintenance.