Your Go-To AC Inspection Guide

When the summer heat hits Chicago and the surrounding suburbs, a working air conditioner is more than a luxury - it’s a necessity. I’ve learned that regular AC inspections can save you from unexpected breakdowns and high repair costs. That’s why I want to share a simple, practical AC inspection guide to help you keep your system running smoothly all season long.

This guide breaks down the key steps you should take during an AC inspection. Whether you’re a hands-on homeowner or prefer to know what to expect when a professional visits, this checklist will give you confidence and peace of mind.

Why You Need an AC Inspection Guide

Your air conditioner works hard to keep your home cool and comfortable. Over time, dust, debris, and wear can reduce its efficiency or cause it to fail. An inspection helps catch small problems before they become costly repairs.

Here’s why following an AC inspection guide is smart:

• Improves efficiency: Clean and well-maintained parts use less energy.

• Extends lifespan: Regular care prevents premature breakdowns.

• Enhances comfort: Ensures your home stays cool when you need it most.

• Saves money: Avoids expensive emergency repairs and lowers utility bills.

  
  

By inspecting your AC regularly, you’re investing in your home’s comfort and your wallet.

Outdoor AC unit during inspection

Step 1: Check the Air Filter and Replace if Needed

The air filter is your AC’s first line of defense against dust and allergens. A clogged filter restricts airflow, making your system work harder and less efficiently.

What to do:

1. Locate the air filter inside your indoor unit or return air vent.

2. Remove the filter and hold it up to the light.

3. If you can’t see light through it or it looks dirty, replace it.

4. Use the filter size recommended by your AC manufacturer.

5. Plan to check or replace filters every 1-3 months during heavy use.

   
   

A clean filter improves air quality and helps your AC cool better.

Step 2: Inspect the Thermostat Settings and Function

Your thermostat controls when your AC turns on and off. If it’s not working properly, your home might not reach the desired temperature or your system could run unnecessarily.

How to inspect:

• Set the thermostat to “cool” mode and lower the temperature below the current room temperature.

• Listen for the AC to start running within a few minutes.

• Check if the fan runs smoothly and the air blowing out feels cool.

• If you have a programmable thermostat, verify the schedule matches your needs.

• Replace batteries if your thermostat uses them.

  
  

If the thermostat doesn’t respond or the temperature doesn’t change, it may need recalibration or replacement.

Step 3: Examine the Outdoor Unit and Clear Debris

The outdoor condenser unit is exposed to weather, leaves, and dirt. Keeping it clean ensures proper airflow and heat exchange.

Inspection tips:

• Turn off power to the unit before inspecting.

• Remove leaves, grass, and debris from around the unit.

• Check for bent or damaged fins on the condenser coil.

• Use a soft brush or fin comb to straighten bent fins carefully.

• Make sure the unit is level and stable on its pad.

• Clear at least 2 feet of space around the unit for airflow.

  
  

A clean outdoor unit helps your AC run efficiently and prevents overheating.

Clean outdoor AC unit ready for summer

Step 4: Check Refrigerant Lines and Look for Leaks

The refrigerant lines carry the cooling agent between the indoor and outdoor units. Leaks or damage here can reduce cooling power and increase energy use.

What to look for:

• Inspect the insulated refrigerant line for cracks or wear.

• Look for oily residue or wet spots that may indicate leaks.

• Ensure insulation is intact and replace if it’s missing or damaged.

• If you suspect a leak, call a professional technician to test and recharge refrigerant.

  
  

Handling refrigerant requires special tools and certification, so don’t attempt repairs yourself.

Step 5: Test the Drain Line and Pan

Your AC removes moisture from the air, which collects in a drain pan and flows out through a drain line. A clogged drain can cause water damage or mold growth.

How to inspect:

• Locate the drain pan under the indoor unit.

• Check for standing water or rust.

• Follow the drain line to ensure it’s clear and draining properly.

• Use a wet/dry vacuum or a pipe cleaner to clear clogs if needed.

• Pour a cup of bleach or vinegar down the drain line to prevent algae buildup.

  
  

Regular drain maintenance keeps your system safe and dry.

Step 6: Listen and Look for Unusual Signs

Your senses can alert you to problems before they get worse.

During your inspection, pay attention to:

• Strange noises like grinding, rattling, or squealing.

• Unpleasant odors coming from the vents.

• Weak airflow or inconsistent cooling.

• Frequent cycling on and off.

  
  

If you notice any of these signs, it’s time to call a professional for a thorough check.

Step 7: Schedule Professional Maintenance Annually

While you can do many inspection steps yourself, a licensed HVAC technician can perform a detailed tune-up. They will:

• Test electrical connections and tighten if needed.

• Measure refrigerant levels and recharge if necessary.

• Clean coils and blower components.

• Inspect ductwork for leaks or blockages.

• Verify overall system performance.

  
  

Scheduling annual professional maintenance helps catch hidden issues and keeps your AC running at peak efficiency.

By following this ac inspection checklist, you’ll be well-prepared to keep your air conditioner in top shape. Regular inspections and maintenance not only protect your investment but also ensure your home stays cool and comfortable through Chicago’s hot summers.

Taking these simple steps now can save you time, money, and stress later. Remember, a little care goes a long way in keeping your AC reliable and efficient.

Stay cool and comfortable all season long!