Illinois summers don't ease you in — they arrive fast, hot, and humid. The worst time to discover your AC has a problem is during a heat advisory in July when every HVAC company in Will County has a 3-day wait list.

A spring AC tune-up is the most cost-effective thing you can do to protect your comfort and your equipment. Here's exactly what a professional tune-up includes — and what to watch out for.

The Complete AC Tune-Up Checklist

When a New Lenox Heating technician performs an AC tune-up, here's what gets done:

Outdoor Unit (Condenser)

  • Clean condenser coils — dirt and debris on the coils reduce efficiency by up to 30%
  • Inspect and straighten condenser fins
  • Check refrigerant levels — low refrigerant means the system works harder and cools less
  • Test capacitors and contactors — these are the most common failure points on AC systems
  • Inspect electrical connections and tighten as needed
  • Check the disconnect box and wiring
  • Inspect the pad and ensure the unit is level

Indoor Unit (Air Handler / Evaporator)

  • Inspect and clean evaporator coils
  • Check and clear the condensate drain line — a clogged drain causes water damage and mold
  • Inspect the blower motor and wheel
  • Check the air filter and replace if needed
  • Inspect the ductwork connections at the air handler

System Performance

  • Measure temperature differential (supply vs. return air) — should be 14–22°F
  • Test thermostat calibration and operation
  • Check system cycling and run times
  • Measure amperage draw on motors

What a Tune-Up Won't Cover

A tune-up is a maintenance service, not a repair. If the technician finds a failing capacitor, a refrigerant leak, or a worn contactor, those are separate repairs with separate costs. A good technician will show you the issue and give you options — not pressure you into an immediate decision.

The Best Time to Schedule in Illinois

April and early May are ideal. The weather is mild, HVAC companies aren't yet slammed with emergency calls, and you have time to address any issues found before the heat arrives. By late May, wait times start to grow. By July, you may be waiting 3–5 days for a non-emergency appointment.

Signs You Need More Than a Tune-Up

If your AC system is showing any of these signs, mention them when you schedule — the technician will pay extra attention:

  • The system runs constantly but doesn't cool below 78–80°F on a hot day
  • You hear grinding, squealing, or banging noises
  • There's ice forming on the refrigerant lines or indoor unit
  • Your energy bills have increased significantly without explanation
  • The system is 12+ years old

New Lenox Heating currently offers a spring AC tune-up special for $89 (regularly $139). Call 815-893-3642 to schedule.

Frequently Asked Questions

What does an AC tune-up include?

A professional AC tune-up includes inspecting and cleaning the condenser coils, checking refrigerant levels, testing electrical connections and capacitors, lubricating moving parts, checking the thermostat calibration, inspecting the air filter, and testing overall system performance.

How often should I get an AC tune-up in Illinois?

Once per year is the standard recommendation — ideally in spring before the cooling season begins. Illinois summers are hot and humid, and a system that hasn't been serviced is far more likely to fail during a heat wave.

How much does an AC tune-up cost in New Lenox, IL?

A professional AC tune-up in New Lenox typically costs $89–$139. New Lenox Heating currently offers a spring AC tune-up special for $89.

Can I do my own AC tune-up?

Homeowners can safely replace the air filter, clean debris from around the outdoor unit, and check that the thermostat is working. However, checking refrigerant levels, testing electrical components, and cleaning coils requires a licensed HVAC technician and specialized equipment.