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HVAC cost guide · Illinois

AC & furnace repair and installation in Illinois

Same-day pros across 223 Illinois cities. Estimate your cost, then call to lock in the price.

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Popular Illinois cities
ChicagoAuroraJolietNapervilleRockfordSpringfieldElginPeoria
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Typical Illinois pricing

What it costs across Illinois

AC Repair

$150 – $1.4k+

AC repair cost depends on the failing part and whether the system is low on refrigerant, electrical, or mechanical. Common fixes — capacitors, contactors, fan motors, refrigerant recharges — land between $150 and $1,500 including labor, while a failed compressor runs higher.

See Chicago pricing →

Furnace Repair

$150 – $1.7k+

Furnace repair cost depends on the failing part and whether the unit is gas or electric. Common fixes — flame sensors, igniters, blower motors, control boards — land between $150 and $1,800 including labor, while a cracked heat exchanger runs higher.

See Chicago pricing →

AC Installation

$3.3k – $8.4k+

AC installation cost covers the equipment and labor to fit a new system — whether it's a like-for-like central AC replacement, a first-time install with new ductwork, or a ductless mini-split. The number swings with tonnage, SEER2 efficiency tier, and duct condition.

See Chicago pricing →

AC Maintenance

$70 – $175

AC maintenance — a seasonal tune-up — keeps the system running efficiently and catches small faults before they become summer breakdowns. A single visit runs $75–$200; annual plans that bundle a spring AC and fall heating check cost a bit more.

See Chicago pricing →

* Statewide medians — open a city for locally adjusted pricing.

Local guide · Illinois

What’s different about Illinois.

Generic cost pages skip the things that actually decide your price and which system fits here — local code, climate, and the money you can claim back.

Recommended unit for Illinois

High-SEER2 AC + gas furnace

Given Illinois’s cold climate and gas heating, high-seer2 ac + gas furnace is the sensible default for most Illinois homes. A pro can confirm the right size and system for your home with a load calculation.

Sources: ComEd Heating & Cooling Discounts · EIA Illinois state energy data · EnergySage Illinois heat pump incentives

What Illinois code requires

Across Illinois, installing or replacing an HVAC system means meeting these statewide rules under the state mechanical code:

  • Permit

    Mechanical permit pulled by your licensed HVAC contractor; covers equipment, refrigerant, and the electrical disconnect.

    Required
  • SEER2 minimum

    Federal North-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.

    13.4 SEER2 (North)
  • Load calculation

    Sizing by load calc — not rule of thumb — prevents an oversized unit that short-cycles and never dehumidifies.

    Required (Manual J)
  • Refrigerant
    R-454B / R-32 (R-410A phased down 2025+)
  • Good to know

    Illinois follows the 2021 IECC, which requires an ACCA Manual J load calculation for HVAC sizing on permitted installs; cold-climate winter sizing matters in the north.

    —

Sources: ComEd Heating & Cooling Discounts · EIA Illinois state energy data · EnergySage Illinois heat pump incentives

Talk to a local pro

Not sure which rules and rebates apply to your home?

A licensed Illinois pro will walk you through code, the right unit, and what you can claim back — in one quick call.

Call now: (855) 321-3116

No obligation — talk through your options.

Money back in Illinois

Illinois heating is mostly gas, which shapes the money back:

The federal 25C Energy Efficient Home Improvement Credit (30%, up to $2,000 for a qualifying heat pump and up to $600 for a high-efficiency central AC) historically applied in every state, though recent federal legislation phased it out at the end of 2025 — verify current eligibility.

Talk to a local pro

Ready to get your HVAC system serviced in Illinois?

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  • Licensed & insured
  • Same-day availability
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  • Local pros near you
Call now: (855) 321-3116

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All 223 Illinois cities

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How it works

Comfort back in three steps.

  1. 1

    Tell us what’s wrong

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  2. 2

    Get matched with a local pro

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  3. 3

    Repair or replace, fast

    Your pro confirms the price on-site and gets your comfort back. Most jobs done in a few hours.

FAQ

HVAC FAQs — Illinois

In Illinois, a mechanical permit is generally required for an AC or heat pump install. Your licensed HVAC contractor pulls it; it covers the equipment, refrigerant, and electrical disconnect.

Get an HVAC quote in Illinois.

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