AC Replacement in St. Charles, IL
Free estimates for a new air conditioner in St. Charles, IL. As of October 2026, central air with the matching coil costs $5,000 to $9,000 installed.
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Get a Free New AC Estimate in St. Charles
Free in-home replacement estimates from a Lennox Premier Dealer.
- Good, Better and Best options with upfront pricing
- ComEd rebates applied where you qualify
- Financing available, including 0% APR on select Lennox systems during Lennox promotions
- Sized with a load calculation, installed and permitted
Repair Instead of Replace?
If your air conditioner may be worth fixing, our St. Charles AC repair team starts with a $75 diagnostic.
- $75 diagnostic ($99 evenings, weekends & holidays)
- 24/7 emergency service, with same-day appointments available
- Trucks stocked with common AC parts like capacitors and contactors, so most repairs are done in one visit
- Upfront, flat-rate pricing before any work starts
Choosing a New Air Conditioner for a St. Charles Home
Many St. Charles air conditioners are 15 to 25 years old, and some still run on R-22, so a leak or failed compressor is often the moment to replace. In the large two-story homes built from the 1970s through the 2000s, upstairs bedrooms sit far from the air handler with limited return air, and they run warm in summer. A larger condenser does not fix that. We size the new AC from a load calculation, then look at return air, balancing or zoning to move cool air where it is needed. Newer homes on the west side often have original equipment due for its first replacement, and we match the coil to the furnace so the new system reaches its rated efficiency. We also check condenser placement and access before quoting.
AC Installation in St. Charles: How It Works
It starts with a free visit to your St. Charles home. We measure the house and ductwork, check the electrical service and condenser location and run a load calculation, then give you written Good, Better and Best Lennox options with rebates and financing. On install day, our own crew recovers the old refrigerant, sets the new condenser and matching indoor coil, replaces or flushes the refrigerant lines as needed, pulls a deep vacuum and charges the system by measurement. We check airflow and temperature split before we leave and register the warranty.
Repair or Replace Your St. Charles Air Conditioner?
Most central air conditioners last 12 to 17 years here. Replacement usually makes more sense when the compressor or coil fails on an older unit, the system still uses R-22 refrigerant, or repairs keep coming back. If your St. Charles AC is younger and the problem is a capacitor, contactor or fan motor, a repair is often the better value, and our St. Charles AC repair team can diagnose it for $75.
Cooling Services in St. Charles
Related services for St. Charles homeowners.
New AC Cost in St. Charles
As of October 2026, a new air conditioner from Pure Comfort costs $5,000 to $9,000 installed in St. Charles, including the matching indoor coil. Tonnage for large two-story homes, coil matching and return air or zoning work for warm upstairs rooms drive most of the AC price. Replacing the AC and furnace together costs $8,000 to $19,000. Every estimate is free and in writing, with rebates and financing shown before you decide.
| Item | Typical price | What changes it |
|---|---|---|
| Free in-home estimate | $0 | Load calculation and written Good, Better and Best options |
| New AC with matching coil, installed | $5,000 to $9,000 | Tonnage, efficiency, single-stage versus two-stage or variable-capacity, line set and electrical |
| AC and furnace together | $8,000 to $19,000 | Matched Lennox system with shared labor |
| Heat pump instead of AC | ComEd rebates may apply | Qualifying ducted heat pumps that also heat in spring and fall |
| Install time | Usually 1 day | Zoning or an added ductless head can add a day |
| Permit and inspection | Arranged where required | Who files depends on the Village of St. Charles |
| Financing | 0% APR on select Lennox systems | During Lennox promotions; longer terms with interest on projects over $2,000 |
Where a permit is required, we confirm the City of St’s current requirements and pull the permit, or help you file it in towns where the homeowner applies, then schedule any required inspection. Charles requires them, and we confirm the City’s current permit and inspection requirements for each air conditioner replacement.
Why St. Charles Homeowners Choose Pure Comfort
Pure Comfort focuses on clear answers, sound system design and work that holds up after the service truck leaves.
Local and family-owned
Founded in Streamwood in 2008 and still owned and operated by the family who started it.
In-house technicians
Service and installation completed by our own crews, never subcontracted to another company.
Certified and insured
NATE and EPA Section 608 certified, fully licensed and insured for the work we carry out.
Lennox Premier Dealer
Premier Dealer standing, with service and repair covering all major HVAC makes and models.
Not Sure Whether to Repair or Replace?
We will assess the system, explain what we find and help you compare the realistic options for your St. Charles home.
Feedback From Homeowners We Serve
Choosing an HVAC company means trusting the people who enter your home and the work they leave behind. Read recent customer feedback about Pure Comfort’s communication, care and workmanship.
Recent St. Charles installs
Lennox furnaces and air conditioners installed by our team in St. Charles homes.
What St. Charles homeowners say
“Gene and his crew did an excellent job installing a new furnace and air conditioner system. I recommend Pure Comfort in a heartbeat. 6 stars in my opinion.”
Furnace and AC installation
“We recently had Pure Comfort replace our furnace and air conditioner, and we couldn’t be happier with the experience. Their team was exceptionally knowledgeable and professional throughout the entire process.”
Furnace and AC replacement
“Great service and great techs! Pricing was good. Techs arrived at the time quoted. I will use only Pure Comfort anytime I need heat or AC service.”
Service visit
“Fantastic service! Friendly people! Very thorough with their work. Would recommend them to anyone!”
Service visit
“Very satisfied with Pure Comfort. Vince is a very knowledgeable technician.”
Service visit
When you need HVAC due to an unexpected event you want someone who not only can provide the service you need….
Great service. Very professional. They try all avenues to resolve issues with equipment. Always a pleasure to work….
Had an issue with the thermostat reading erroneously, as soon as I contacted Pure Comfort, they got back….
Our serviceman, Gene, was very responsive, professional and thorough. He explained each aspect of the issue clearly and….
I called them at 7am with no heat, the only available spot they had was in the afternoon, 5 minutes later they called….
Gene was professional, on-time, very friendly and did a thorough job inspecting our A/C unit. He also checked….
Quick and honest service and advice last minute on a Sunday. Clean crew and equipment. Gene was a knowledgeable….
Gene did not give up on the problem. It was a crazy situation but he never gave up found the problem and fixed it. Thank you….
Furnace wasnt working. Called Pure Comfort after hours and they came right out and helped me. The furnace….
Very professional, definitely knowledgeable had the furnace fixed in 10 minutes. I can honestly say I trusted Gene….
AC Replacement Near St. Charles
Pure Comfort installs new air conditioners throughout St. Charles (60174, 60175) and the towns around it, including AC replacement in South Elgin, AC replacement in West Chicago and AC replacement in Elgin. Our shop is in Streamwood, about 25 minutes away, and our own crews handle every install.
Not on the list? We cover much of the northwest suburbs, so call and we will confirm your address in a minute.
St. Charles AC Replacement FAQs
How much does a new AC cost in St. Charles?
As of October 2026, a new air conditioner from Pure Comfort costs $5,000 to $9,000 installed in St. Charles, including the matching indoor coil. Tonnage for large two-story homes, coil matching and return air or zoning work for warm upstairs rooms drive most of the AC price. Replacing the AC and furnace together costs $8,000 to $19,000, and ComEd rebates can apply if you choose a qualifying heat pump instead.
How do I get a free AC replacement estimate or quote in St. Charles?
Call (708) 515-4822 or book online. We visit your St. Charles home, measure the house and ductwork, run a load calculation and give you written Good, Better and Best options with rebates and financing. The estimate is free, and there is no pressure to decide on the spot.
Do I need a permit to replace an air conditioner in St. Charles?
Where a permit is required, we confirm the City of St’s current requirements and pull the permit, or help you file it in towns where the homeowner applies, then schedule any required inspection. Charles requires them, and we confirm the City’s current permit and inspection requirements for each air conditioner replacement.
Is a two-stage or variable-speed AC worth it in St. Charles?
In St. Charles’s larger two-story homes, a two-stage or variable-speed AC with a variable-speed blower is worth it for evening out upstairs heat and controlling humidity. Smaller homes often do fine with a right-sized single-stage unit.
How long does AC replacement take?
Most air conditioner replacements in St. Charles take one day, including the new condenser, matching indoor coil, refrigerant lines when needed and startup testing. Adding zoning or a ductless head upstairs can add a day.
Is there an AC installation company near me in St. Charles?
Yes. Pure Comfort is based in Streamwood, about 25 minutes from St. Charles, and installs air conditioners across 60174 and 60175. We are a Lennox Premier Dealer with NATE-certified technicians, and our own crews do every install.
Should I replace my furnace and AC at the same time in St. Charles?
If both are about 15 years old or older, replacing them together usually saves on labor and lets us match the new furnace blower to the new AC coil for better efficiency. A furnace and AC replaced together typically runs $8,000 to $19,000 installed. If one system is much newer, we can replace only the one that needs it.
Schedule a Free AC Estimate in St. Charles
Get a careful diagnosis, straightforward options and help from a local HVAC company that stands behind its work.
- You get a scheduled window and the technician's name
- We diagnose and price the work before anything starts
- Replacement estimates are free, with no obligation
Call rather than using the form: (708) 515-4822. Forms are checked during business hours, so a phone call gets you a faster answer.