AC Replacement & Installation in Mount Prospect, IL
Get a free quote for a new AC in Mount Prospect. Most installs run $5,000 to $9,000 with the matching indoor coil.
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Free New AC Estimate
In-home estimates are free, with no pressure to decide.
- Clear prices on each system
- Rebates listed up front
- Financing available, including 0% APR on select Lennox systems during Lennox promotions
- Sized with a load calculation, installed and permitted
Try a Repair First?
A newer AC may just need a part. We diagnose for $75.
- $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
Quick Summary
As of October 2026, a new central air conditioner from Pure Comfort Heating and Cooling costs $5,000 to $9,000 installed in Mount Prospect, IL (60056), including the matching indoor coil. Estimates are free and in writing, every system is sized with a load calculation, and replacing the AC and furnace together costs $8,000 to $19,000. Financing includes 0% APR on select Lennox systems during promotions. Call (708) 515-4822.
Reviewed by Gene Baldassano, owner and NATE- and EPA 608-certified HVAC technician since 2008 · Updated
Finding the Right Air Conditioner in Mount Prospect
Mount Prospect central air often runs on ductwork from the 1950s, laid out for heating long before air conditioning was added. In Cape Cods, the upstairs bedrooms tend to run warm because few supply runs reach them, so we check return air and duct delivery before picking tonnage instead of just matching the old condenser. Oversizing an AC on small ducts leads to short runs and a damp house. Some homes still have R-22 systems, which means a new condenser and matched indoor coil, plus a check of the line set. On smaller lots, we also plan condenser placement around setbacks and neighbors.
AC Installation in Mount Prospect: How It Works
Here is the process. A free in-home visit to measure and run a load calculation, written Good, Better and Best options, then a one-day install for most homes by our own crew. We set the condenser and matching coil, purge with nitrogen while brazing, pull a deep vacuum and charge by superheat and subcooling. You get a startup check, a thermostat walkthrough and warranty registration.
Is It Time to Replace Your Mount Prospect AC?
We will tell you plainly. Small parts like capacitors and contactors are worth fixing on most ACs. A failed compressor or leaking coil on a unit older than 12 years, or any system still on R-22, usually is not. Central air here lasts about 12 to 17 years.
Cooling Services in Mount Prospect
More services for homes in Mount Prospect.
Central Air Replacement Cost in Mount Prospect, IL
Expect $5,000 to $9,000 for most AC replacements. If the furnace is due too, the full system runs $8,000 to $19,000. Every quote is free, written and includes available rebates and financing, including 0% APR on select Lennox systems during promotions. Warm Cape Cod upstairs, return-air work on 1950s ductwork and condenser placement on smaller lots drive most of the price.
| 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 Mount Prospect |
| Financing | 0% APR on select Lennox systems | During Lennox promotions; longer terms with interest on projects over $2,000 |
We review permit needs for each AC replacement in Mount Prospect before install day and handle any required filing and inspection.
Why Mount Prospect Homeowners Choose Pure Comfort
We size every AC to the house, install it with our own crew and stand behind the work.
Family-run in Streamwood
Started in Streamwood in 2008. The same family still owns the company and answers for the work.
No subcontractors
Service and installation completed by our own crews, never subcontracted to another company.
Insured and certified
NATE-certified and EPA 608-certified technicians, backed by full licensing and insurance.
Lennox Premier Dealer status
We install Lennox as a Premier Dealer and service every major AC brand.
Our replacement process considers sizing, airflow, ductwork, filtration, venting, electrical requirements and controls. Where a permit is required, we confirm the current Mount Prospect requirements and pull the permit, or help you file it in towns where the homeowner applies, then schedule any required inspection.
Need a Straight Answer on Your AC?
If your AC is worth fixing, we will tell you. If it is not, you will get replacement options in writing.
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.
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….
Towns Near Mount Prospect We Serve
New central air installs cover Mount Prospect (60056) and the towns around it, including AC replacement in Arlington Heights, AC replacement in Des Plaines and AC replacement in Elk Grove Village. Our shop is in Streamwood, about 25 minutes away, and our own crews handle every install.
AC replacement in nearby towns
- Arlington HeightsAC replacement
- Des PlainesAC replacement
- Rolling MeadowsAC replacement
- Elk Grove VillageAC replacement
- PalatineAC replacement
Near Mount Prospect but not listed? We serve towns within about 20 miles of Streamwood. See all service areas or call (708) 515-4822.
Air Conditioner Replacement FAQs for Mount Prospect
Is a new AC in Mount Prospect expensive?
A new air conditioner with its matching coil costs $5,000 to $9,000 installed. We show ComEd rebates for qualifying heat pumps and financing options on the written quote. Warm Cape Cod upstairs, return-air work on 1950s ductwork and condenser placement on smaller lots drive most of the price.
Can I get a new AC quote without a sales pitch?
Yes. The estimate is free, the options are in writing, and you can take your time. We size the system to your Mount Prospect home and show rebates and financing up front.
Do I need a permit to replace an air conditioner in Mount Prospect?
Permit needs for an air conditioner replacement in Mount Prospect depend on the equipment and project scope. Where a permit is required, we confirm the current Mount Prospect requirements and pull the permit, or help you file it, then schedule any required inspection.
Which AC is best for a Mount Prospect home?
It depends on the size and layout. We run a load calculation and recommend single-stage, two-stage or variable-capacity based on your house.
How long does it take to install a new AC in Mount Prospect?
One day for most homes. Our crew sets the condenser and coil, handles the refrigerant lines and tests the system before leaving.
Do you use subcontractors for AC installs in Mount Prospect?
No. Our own NATE-certified crews install every system, and we are about 25 minutes from Mount Prospect.
Should I replace my furnace and AC at the same time in Mount Prospect?
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.
Get a Free New AC Quote in Mount Prospect
Book a free in-home estimate and get written Good, Better and Best options for your Mount Prospect home.
- 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
Prefer to talk? Call (708) 515-4822. Phones are answered 24/7; forms are answered during business hours.