Air conditioning questions, answered

Fixr's 2026 national survey has most AC repairs between $250 and $700, averaging $375; This Old House puts common fixes at $150 to $650. Capacitors sit near the bottom of that, and a compressor can run $600 to $3,000 or more. Each Rockford company sets its own prices, so get yours in writing before anyone starts.

In most houses here, yes. The airport has averaged 18.8 afternoons a year at 90°F or above across 2016-2025, against 14.8 for 1991-2020, plus roughly 54.1 a year at 85°F or above. The muggy nights in between are what keep people awake. And since the typical Rockford home already has a gas furnace with ductwork, most of the plumbing for central air is already in the basement.

Most of the time. With a furnace and ducts, the question is whether the old ducts are big enough, which an installer should measure. With a boiler and radiators, you are pricing ductless wall heads against a small-duct high-velocity system run through closets. Get both numbers.

Depends on the part. Spending on a compressor or coil for a unit at the end of its life rarely pays off. A capacitor or contactor on that same unit costs little and usually buys more summers. This Old House estimates that a home cooling system usually lasts 12 to 15 years.

One independent HVAC company that works in your ZIP. Rock River Cooling Desk only makes the referral, which saves you calling around. Within Rockford city limits that company needs a City of Rockford mechanical license, and anyone handling refrigerant needs EPA Section 608 certification. It is fair to ask to see both.

Fixr publishes $5,800 to $14,400 installed for a new central air system nationally. When the furnace and basement ducts are already in decent shape, adding the coil and condenser tends to price toward the bottom of that span. Ask for line items.

Square footage alone won't tell you. A Manual J load calculation looks at insulation, windows and exposure, and the Department of Energy cautions that rules of thumb tend to produce oversized equipment.

Within Rockford city limits, yes: a mechanical permit, pulled by a contractor holding a City of Rockford mechanical license. Loves Park, Machesney Park, Belvidere and the villages each handle permits on their own terms.

Libraries and large stores keep the air on, and during heat advisories the City of Rockford and the counties often post cooling locations. Those lists change, so check the current notice and call first.

LIHEAP, run by Illinois DCEO, helps eligible households with home energy costs, mostly for winter heat. Apply through the local agency for your county, or call Help Illinois Families at 1-833-711-0374.

Often it isn't. The CDC warns that electric fans may not prevent heat-related illness in very hot weather, so plan to spend the worst afternoon hours in an air-conditioned building.

No. Per EPA, the rule leaves existing systems alone, and repairs can keep using R-410A components.

Only if every component was made or imported before January 1, 2025, under the reconsideration rule EPA issued in May 2026. Anything built from newer components has to use a refrigerant below 700 GWP.

Fixr's published installed span is $5,800 to $14,400, and its $8,750 average assumes the ducts are new too. Collect two itemized quotes before deciding.

The published part prices stay the same all year. What changes is demand: most Rockford systems get their first hard test in the same few weeks, so schedules fill and after-hours charges come into play.

This Old House gives a typical home cooling system 12 to 15 years. Here the wear comes from long idle winters, cottonwood fluff clogging coils in June and humid weeks in the 90s. Keeping the outdoor coil clean helps.

When both are near the end, frequently yes. The coil sits on the furnace in most Rockford basements, so the work overlaps, and it is the natural time to price a heat pump.

Twenty BTUs per square foot puts a 2,000 sq ft house near 40,000 BTUs, which is 3 to 3.5 tons. Treat that as a first guess and let a Manual J calculation set the final size.

Fixr's $8,750 national average describes a 3 ton, 16 SEER split system with all-new ducts in a 2,000 sq ft home. Keeping good existing ducts usually brings the price down.

Between the last snow and early May. Over 2016 to 2025 the airport's first 85 degree day landed around mid-May on average, and schedules tighten right after it.

This Old House lists $65 to $200 as the national range. A replacement part found during the visit, such as a capacitor, is normally billed on top.

In a Rockford basement-furnace house the usual suspects are a capacitor or fan motor at the condenser, a coil iced over behind a dirty filter, a refrigerant leak, or a thermostat left on fan. Swap the filter and look at both breakers before booking.

A hum with no fan movement very often means the start capacitor has weakened. That part stores a charge even with the breaker off, so it is a technician's job.

The AC coil normally rides on top of the furnace and sends its condensation down a small drain line or into a pump. If the line plugs, the water backs up and spills. Shut the cooling off and have the line cleared before the furnace gets wet.

A breathable lid on top keeps falling ice off the fan, but full plastic wrap holds moisture against the coil. Keep drifts shoveled away, and take any cover off before the first warm day in May.

Fixr's national figures are $4,577 to $8,328 installed, with a $6,357 average. Multi-zone systems for a whole house run higher, so ask for a per-head price in writing.

A cold-climate heat pump model can handle much of a Rockford winter. Most owners keep the boiler or furnace for the coldest stretches. Ask for the rated heating output at low outdoor temperatures before you buy.

No. A small bundle runs through the wall from each indoor head to the condenser: refrigerant lines, a power cable and a condensate drain.

Frequent causes include a dirty flame sensor, a worn igniter, a clogged filter or a vent pipe blocked by snow. If it lights and then quits, time how long it runs and pass that along to the technician.

A contractor holding a City of Rockford mechanical license. The City requires that license number on every permit application, so ask for it up front.

Cold-climate models keep heating through a typical Rockford January, though output drops as it gets colder. Most installs here keep the gas furnace for the coldest days. Ask for the rated output at 5°F.

Fixr publishes $5,000 to $15,000 installed nationally, with an $8,350 average. Some equipment qualifies for ComEd rebates; the installer can tell you which.

No. According to the IRS, the 25C credit for energy efficient home improvements ended for property placed in service after December 31, 2025.

Inside the City of Rockford, yes. The City's mechanical permit covers replacing an existing air conditioner as well as a new one. The installer normally pulls it.

No. Illinois has no statewide HVAC contractor license. The City of Rockford requires a City mechanical license, and other towns set their own rules. Refrigerant work also requires EPA Section 608 certification.

Ask for the license number; the City requires it on every permit application. You can confirm it with Construction and Development Services at 779-348-7158.

It sits well above what's published: $80 to $400 installed from This Old House and $100 to $400 from Fixr. Ask what else the price covers, and get it itemized on paper.

That is above Fixr's $5,800 to $14,400 published range for new central air. A number that high should spell out the extras, such as new ductwork or a second system. Get another quote.

According to the Illinois Attorney General, you have three business days to cancel a contract signed at your home, and starting the work doesn't take that away. Check the cancellation notice in your contract. General information only, not legal advice.

Age in years times repair cost in dollars. When the result passes 5,000, This Old House suggests looking at replacement instead of repair. It is a rough rule, nothing official.

It works as a first pass. Keep in mind that a heat pump runs in winter as well as summer, so it piles up hours faster than an air conditioner of the same age.

They are the simplest to set up and the weakest performers. A single-hose model pushes room air outside, and warm outdoor air leaks in to replace it. A window unit with the same rating generally cools better.