An outdoor air conditioning condenser unit positioned beside a blue-sided house at sunset.

AC Maintenance in Oswego, IL

Air conditioners here run from June through August, so May is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Kendall County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor air conditioning condenser unit positioned on a concrete pad next to a blue-sided house, surrounded by green shrubs and flowering hydrangeas at sunset.

Three months of hard running

Your air conditioner in Oswego only earns its keep from June through August, with afternoons averaging 83°F. It sits idle most of the year, then gets asked to run for weeks straight once the heat sets in. Parts that sat still all that time don't always start up clean.

Kendall County has also logged 34 hail events and 70 damaging wind events over the past ten years, with hail as large as 4.75 inches. Your outdoor unit sits through all of that weather. Bent fins or a dented cabinet can restrict airflow without any sign of it until the system is straining to keep the house cool. A tune-up checks the coil, the fins, and the refrigerant charge, so what the weather did gets caught before June asks the system to work.

3 months
June through August, your air conditioner is on duty
83°F
the average summer afternoon it cools against
34 hail events
in ten years, and hail bends the fins on outdoor coils
70 wind events
in ten years, and wind drives debris into outdoor units
Isometric cutaway illustration of a single-story house showing interior rooms with furniture, attic ductwork connected to an indoor air handler, and an outdoor condenser unit on a pad linked by refrigerant lines.
Your air conditioner works hardest from June through August.

NOAA nClimDiv, 1991–2020 normals

Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

Book your AC tune-up in May, before homes here start needing cooling in June.

  1. Jan
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  5. May
  6. Jun
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  8. Aug
  9. Sep
  10. Oct
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  12. Dec

A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.

In Illinois, HVAC licensing for homes is left to the cities and towns.

Whether your air conditioner technician needs a license depends on the town, not the state. Illinois has no state HVAC license and no state board keeping a record of who is qualified. Whatever license or record exists for a contractor sits with the city or town, not with any state agency.

For a maintenance visit on an air conditioner, the part that's regulated everywhere is the refrigerant. Any technician who opens the refrigerant side of the system, to check the charge or work on the coil, has to hold EPA Section 608 certification. That's a federal certification tied to the technician, not a license, and it applies the same in Kendall County as anywhere else in the country.

Source: Illinois General Assembly

What does AC maintenance include?
A contractor checks refrigerant charge, cleans the condenser coil outside, and looks over the electrical connections. They also test the capacitor, check the blower and airflow, and confirm the thermostat is calling for cooling correctly. Coil cleaning matters most here after hail, since dented or dirty fins block airflow and make the system work harder.
How often does an air conditioner need maintenance?
Once a year is enough for most homes. Spring, before the cooling months start in June, is the right time to get it done. That gives a contractor time to catch a weak capacitor or a low refrigerant charge before you need the system every day.
Is AC maintenance worth it?
Yes, because most breakdowns trace back to something a checkup would have caught. A dirty coil or a failing capacitor does not fix itself, and both get worse under daily use. Cooling season here only runs June through August, so a system that breaks down mid summer has to be fixed fast, and a spring checkup is the way to avoid that.