Let’s be real – you probably don’t think about your heating and cooling system until something goes wrong. That’s normal. But when your furnace won’t fire up on a freezing February morning, or your AC quits during a summer scorcher, suddenly it’s all you can think about. That’s where we come in. We’re K&J Heating and Cooling, and we’ve been solving HVAC problems for Chicagoland suburban families for years.
Your Trusted HVAC Team in the Western Suburbs
Welcome to K & J
Your Comfort, Our Priority
Complete Heating & Cooling Solutions
Heating Systems
Whatever keeps you warm, we know how to fix it. From strange noises to complete breakdowns, our heating experts have seen it all and can handle anything your system throws at us.
Your neighbors in comfort.
We’re an old-school, local business that understands that too many homeowners get the runaround from large companies that don’t really care. Here’s what makes us different: we show up on time, we explain things in plain language (not confusing technical jargon), and we never push services you don’t actually need. None of our technicians are commissioned, so no pushy salespeople in your home!
We’re not just another HVAC company – we’re your neighbors here in DuPage County.
Our team has decades of combined experience, but we never stop learning. We may be old school, but we know HVAC technology continues to evolve, and we evolve with it so we can offer you the best, most efficient solutions available. When you work with K&J, you’re working with people who genuinely care about keeping your home comfortable.
Complete Heating & Cooling Solutions
Quality work. Honest people. Total comfort.
Here’s Why You Should Choose Us
Honest, Upfront Pricing
Carrier Factory Authorized Dealer
Same-Day Service Available
100% Satisfaction Guarantee
Warranty Compliance
What Your Neighbors Are Saying About Us
We care about our reputation the same way we do the quality of work we provide.
My family and I have been using K&J for years now and we even use them at my work. They provide excellent customer service and are always honest with great pricing. We had the pleasure of working with Sam recently for maintenance on our heater and we couldn’t be happier. I’d absolutely would recommend them to everyone. Great service all around!
Yimmy N.
We have relied on K&J Cooling for several years now. They don’t just do routine maintenance but have helped us fix serious issues with our HVAC system so we’ve come to expect a lot from their Technicians. Sam more than delivered. He was knowledgeable, experienced and very conscious of our time and budget. On top of that, he cleaned up his work areas beautifully. We will definitely be requesting him again come Spring.
Patricia P.
My experience with K & J was very positive. We’d been dealing with ongoing furnace issues and had multiple companies try to fix the problem. Paul was extremely knowledgeable and took the time to ensure everything was working properly. Unlike other companies, he accurately diagnosed the issue instead of just applying a temporary fix.
Alex M.
Affordable comfort for every budget.
Flexible Financing Options Available
A broken HVAC system is stressful enough without worrying about how to pay for it. We partner with leading financial institutions to offer payment plans that fit your budget. Our financing options include low monthly payments and special promotional rates for qualified applicants.
© 2026 K&J Heating & Cooling. All rights reserved.
Our Services Areas
Serving Chicago's Western Suburbs
Wheaton
Glen Ellyn
Downers Grove
Oak Brook
Naperville
Lombard
Carol Stream
Lisle
Woodridge
Elmhurst
Villa Park
Addison
Ready to Get Back to Comfortable?
Book Your HVAC Service Today
Don’t let HVAC problems stress you out. Whether it’s a small fix or a big project, we’ve got the skills and experience to handle it. Reach out by phone or fill out the form below, and we’ll get back to you fast with straight answers and scheduling options that work for you.
4.9 RATING
Wheaton
Glen Ellyn
Downers Grove
Oak Brook
Naperville
Lombard
Carol Stream
Lisle
Woodridge
Darien
Villa Park
Addison
Comfort you can feel.
Services you can trust.
Cooling Systems
When summer hits, your AC becomes essential. We repair, maintain, and install air conditioning systems that actually keep up with the Illinois humidity. Old unit limping along? New installation needed? We’ll walk you through your options without the pressure.
Air Quality Solutions
Whatever keeps you warm, we know how to fix it. From strange noises to complete breakdowns, our heating experts have seen it all and can handle anything your system throws at us.
Preventive Maintenance
The best repair is the one you never need. Our maintenance specialists keep your system running strong, catch issues early, and extend the life of your HVAC equipment – saving you money in the long run.
Our Special Offers
Because comfort should always feel within reach
Free Whole Home Air Purifier or Humidifier
with any Infinity system purchase
Limited Time Offer. Call for details.
Factory Authorized Dealers are masters of heating and air conditioning craft.
We Are Carrier Factory Authorized Dealers
Our HVAC technicians are specially trained to inspect, diagnose, and provide the most effective and efficient heating and air conditioning solutions for your home. Our priority is to ensure optimal performance and comfort. K&J Heating and Cooling is committed to excellence.
