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Trusted HVAC Services in Buffalo Grove and Surrounding Areas
Expert heating and cooling solutions for your home or business — available 24/7.
Google Rating
5.0
Why clients trust our team for expert HVAC services
When it comes to keeping your home or business comfortable, you want a team you can trust.
15+ Years of Experience
Decades of hands-on knowledge in residential and commercial HVAC.
Licensed & Fully Insured
Peace of mind knowing your property is protected.
Free Service Call with Repairs
Just $89 for diagnostics, waived when you proceed with repair.
Strong Warranties
6 months on labor, 1 year on parts, and up to 10 years on equipment.
We Work with All Major Brands
We install, repair, and service all leading HVAC brands.
Available 24/7
Emergencies don’t wait, and neither do we.
Experienced HVAC professionals you can count on
For over 15 years, NG Air Conditioning has been the trusted choice for heating, cooling, and ventilation services in Buffalo Grove and nearby communities. Our mission is simple: keep your home or business comfortable year-round with fast, reliable, and affordable HVAC solutions.
We are fully insured and back every job with strong warranties — 6 months on labor, 1 year on parts, and up to 10 years on new equipment. Whether it’s an emergency repair, a new AC installation, or seasonal furnace maintenance, our experienced team is here 24/7.
With NG Air Conditioning, you get honest pricing, dependable service, and expert care for all major HVAC brands.
What Our Customers Say
Customers highlight our fast response times, fair pricing, and reliable workmanship.
Most common HVAC problems we solve in Buffalo Grove
At NG Air Conditioning, we’ve seen it all — from broken furnaces in the middle of winter to AC units blowing warm air on a hot summer day. Here are some of the most common HVAC problems our Buffalo Grove customers call us for
No matter the issue, our technicians diagnose the problem quickly and provide fast, affordable HVAC repair in Buffalo Grove and nearby areas
Air conditioner not cooling
The system runs but doesn’t blow cold air, often caused by refrigerant leaks, dirty coils, or compressor issues.
Furnace blowing cold air
A common winter emergency, usually linked to thermostat errors, ignition failure, or airflow problems.
Uneven heating or cooling
Rooms that are too hot or too cold due to duct leaks, poor airflow, or equipment sizing issues.
Strange noises from HVAC system
Banging, rattling, or squealing sounds can signal loose parts, motor issues, or failing components.
High energy bills
Older or poorly maintained systems work harder, driving up utility costs.
Water leaks around the unit
Caused by clogged condensate drains, frozen coils, or refrigerant problems.
System short cycling
HVAC turning on and off too often, stressing equipment and raising repair risks.
Bad odors when system runs
Musty smells can mean mold in ducts, while burning smells may point to electrical issues.
Service areas we proudly serve in Buffalo Grove and beyond
NG Air Conditioning is based in Buffalo Grove and proudly serves homeowners and businesses across the North Shore and northwest suburbs. Our team delivers fast response times and reliable HVAC service throughout:
Buffalo Grove
Riverwoods
Highwood
Kenilworth
Wheeling
Northbrook
Lake Bluff
Highwood
Long Grove
Bannockburn
Glencoe
Wilmette
Highland Par
Lake Forest
Winnetka
Deerfield
If you don’t see your town listed, give us a call.
Flexible financing options for your HVAC project
We’ve partnered with Wisetack and Wells Fargo to give our customers affordable payment options. That way, you can complete your HVAC project now and pay over time — without straining your budget. Checking your options takes just a minute and won’t impact your credit score.
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Wisetack Financing
Finance projects up to $25,000
Flexible terms from 3 to 60 months
0% APR up to 18 months for qualifying customers
Low APR from 3.99% for extended terms up to 5 years
No hidden fees or compounding interest
Wells Fargo Home Projects Credit Card
Special financing offers with approved credit
Convenient monthly payments
Backed by Wells Fargo Bank, N.A.
AC brands we service, repair, and install in Buffalo Grove
At NG Air Conditioning, we work with all major HVAC brands — so whether you own a newer high-efficiency system or an older unit, our technicians have the training and experience to keep it running at its best.
We proudly service a wide range of heating and cooling equipment, including:
Schedule your HVAC service in Buffalo Grove today
For urgent repairs or faster response:
Call us now – our team is available 24/7 to handle emergencies and restore comfort quickly.
For your convenience:
Prefer to schedule at your own time? Book your appointment online in just a few clicks and choose the time that works best for you.
Frequently asked questions about our HVAC services
Do you provide emergency HVAC services after hours?
Yes. NG Air Conditioning is available 24/7 for emergency HVAC repair. Whether your air conditioner breaks down during a summer heatwave or your furnace stops working on a freezing night, our licensed technicians respond quickly to restore comfort. Call us anytime for fast emergency AC repair or furnace service in Buffalo Grove.
What are the signs that something is wrong with my HVAC system?
Common warning signs include unusual noises, weak airflow, uneven temperatures, rising energy bills, foul odors, or your system running constantly without keeping your home comfortable. If you notice any of these, call for HVAC repair before the issue gets worse.
Why is my AC running but not cooling the house?
This can be caused by low refrigerant, dirty coils, clogged filters, or a failing compressor. A professional AC inspection will pinpoint the issue and restore cooling.
Why is my furnace blowing cold air?
A furnace may blow cold air if there’s a clogged filter, ignition failure, thermostat issue, or a problem with the pilot light. Professional diagnostics can identify the cause quickly.
How much does HVAC repair usually cost in Buffalo Grove?
Costs vary depending on the problem and parts required. Minor repairs may be under $200, while major repairs can range from $500–$1,500. At NG Air Conditioning, we charge an $89 diagnostic fee (waived if you approve the repair) and provide upfront pricing.
How often should I change my HVAC air filter?
Every 1–3 months depending on usage, pets, and allergies. A clean filter improves air quality and system efficiency.
Why is my HVAC making strange noises?
Loud banging, squealing, or rattling can signal loose parts, motor issues, or problems with the blower. Don’t ignore unusual sounds — they often mean a repair is needed.
How can I lower my energy bills with my HVAC system?
Regular maintenance, sealing duct leaks, changing filters, and upgrading to a high-efficiency unit can cut your bills. A smart thermostat also helps optimize usage.
How do I know if I need HVAC repair or just maintenance?
If your system still works but shows small issues like weak airflow or unusual noises, it may only need maintenance. But if it stops cooling or heating properly, keeps short cycling, or won’t turn on at all, professional HVAC repair is the safer choice.
Why is regular furnace maintenance so important in Illinois?
Annual tune-ups help prevent mid-winter breakdowns, ensure safe gas combustion, extend the furnace lifespan, and keep energy costs low. In cold climates, this service is essential.