HVAC Services in Marion, IL

Your Comfort Is

Just a Click Away

One Hour Heating & Air Conditioning® Serving Marion

4.84

(160265 reviews)

One Hour Heating & Air Conditioning® delivers trusted heating and cooling service in Marion, IL. If your system breaks down in the heat or quits during a cold snap, we’re ready to help. You can expect fast service and honest answers from trained professionals who respect your time and your home. We handle emergency HVAC service when repairs cannot wait. Our team also provides AC services to help keep your home cool through the hottest months. Every technician is licensed in Illinois and brings the tools, training, and experience to fix the problem right the first time. You get service that solves the issue and keeps your system working when you need it most. Get heating and cooling service in Marion by calling One Hour Heating & Air Conditioning® directly or filling out our online form.

Our Heating and AC Services Deliver Real Results

When your system stops keeping your home comfortable, you need more than a temporary fix. Our furnace and AC services solve the core issue and help extend the life of your equipment. You get steady performance through heat, cold, and everything in between. Fewer breakdowns. Lower energy use. Better comfort, season after season.

Why Do Homeowners Choose One Hour Heating and Cooling®?

Integrity: We honor every commitment we make and take extra steps to meet your expectations without cutting corners.
Legality: Our work complies with all local, state, and federal codes to keep your HVAC system safe and up to standard.
Honesty: We offer clear pricing with no fine print, so you know exactly what you’re paying for before any work begins.
Respectfulness: Your home matters to us. We protect your space, treat your belongings with care, and maintain a clean work area.
StraightForward Pricing® Guide: We explain your service options upfront, so you understand the work and the price before anything starts. There are no hidden fees.
Always On Time... Or You Don’t Pay a Dime!®: Your time matters. We show up within your scheduled window, or the service is free.

Your One-Stop HVAC Company for Heating and Cooling in Marion

Our heating and cooling services cover every stage of your system’s life. From new installations to seasonal tune-ups and long-term repairs, we keep your furnace or AC working as it should. Regular care helps prevent breakdowns, extends system life, and keeps performance steady. You get consistent comfort without the stress of frequent issues or early replacement.

Our Complete Line of AC Services in Marion Includes:

Heating and Cooling Service Designed for Marion Weather

Marion’s humidity, temperature swings, and winter freezes can wear down HVAC parts and reduce airflow. Coils clog faster, filters fill quickly, and systems lose efficiency. One Hour Heating & Air Conditioning® solves the problem with seasonal tune-ups, deep system checks, and quick part replacements. We catch early signs of trouble and keep your furnace or AC ready for extreme weather.

You Can Find Us All Across Marion:

Carterville
Carbondale
De Soto
Goreville
And more!

FAQs

Have questions about heating and cooling in Marion? We’ve answered common concerns below to help you understand how our services work and what to expect. Whether it’s about maintenance, repairs, or system performance, you’ll find clear, straightforward information to help you make smart decisions for your home.

What HVAC Services Do You Offer in Marion, IL?

We handle heating, cooling, indoor air quality, and full system replacements. You can count on us for repairs, installations, and seasonal tune-ups. Every service is designed to keep your home comfortable and your system running smoothly.

How Often Should I Schedule HVAC Maintenance for My Marion Home?

We recommend two maintenance visits per year—once in spring for your AC and once in fall for your furnace. Routine care helps prevent breakdowns and keeps your system efficient. It also gives us a chance to catch minor issues before they turn into major repairs.

Do You Offer 24-Hour Emergency Services?

Yes, we’re available around the clock when your system quits unexpectedly. Our emergency HVAC service helps restore comfort fast, day or night. You won’t have to wait for normal business hours when urgent issues come up.

Don’t Delay. Call Us to Schedule Professional Heating and Cooling in Marion

Keep your home comfortable with reliable heating and cooling support from One Hour Heating & Air Conditioning® in Marion. Whether it’s time for a tune-up or your system needs immediate attention, we’re ready to help. Don’t wait for small problems to get worse. Call now to schedule service and get your system back on track today. Get a quick response when you fill out our online form or call One Hour Heating & Air Conditioning for heating and cooling in Marion.

We Have a Reputation

For Being Punctual, Friendly and Knowledgeable

4.84

(160265 reviews)

Mallory Vivar

in the last week

“Had to reach out to an A/C company, had no idea who to choose but took a chance on One Hour Ac & Heat. Came out to our house at 1am, got us fixed up and signed up for yearly maintenance. Professional all the way around. Thank you so much! Highly recommended!!”

Adria Thomas

in the last week

“Brian did a great job. He was very professional and knowledgeable of his job. I had an appointment for a couple of days later. He called me the next morning saying he was coming that day to repair my a/c and I appreciate it because my house was hot. Brian did a great job!”

SaKarsha SanchezHunter

in the last week

“Spencer provided outstanding HVAC service—he was patient, caring, and incredibly personable throughout the entire visit. He took the time to explain everything clearly, making sure I understood each step of the process. His professionalism and attention to detail were evident, and I truly appreciated how informative and thorough he was. Spencer went above and beyond to ensure I felt comfortable and confident in the work being done. It’s rare to find someone so knowledgeable and genuinely committed to excellent customer service. I highly recommend Spencer for anyone needing trustworthy, top-quality HVAC support.”

Nat Le Narvor

in the last week

“Yesterday, the issue was diagnosed. AC unit needed to be replaced. The team came this morning to install the new unit (inside and outside) and again, they were all very professional, did a great job. Very friendly technicians. They explained the difference between the new unit and the old and shared advice on how to best operate the AC. I highly recommend the service of this company! And my house is called again😃”

Jackie P

in the last week

“Great company! Reliable, responsive and incredibly knowledgeable. They were able to accommodate us same day, thoroughly explain the issue I was having and remediate quickly. Thank you so much for your expertise and professionalism!”

Vernon Fawcett

in the last week

“Nick was amazing. He completed the requested service and also provided some recommendations that we appreciated. Nick was thorough and we're very pleased with the work that was completed today.”

Saundra Middleton

in the last week

“I am very pleased with this maintenance service I received from One Hour Air Conditioning The technician Roberto was very professional and pleasant. He called to let me know he was on his way greeted me at my door, also, he asked if I had any concerns or special needs for his visit. He went right to work cleaning my outdoor unit and also taking care of the unit in the garage Also had great suggestions regarding what type of filter to place in the unit. thank you, Roberto. we’ll see you again in three months.”

Michael Puglise

in the last week

“I actually had One Hour do some work last year and they were out again this year. I really appreciate the fact I can call these guys and they'll show up the same day. That really helps, especially in this Texas heat. I had the same technician, Brent, nearly exactly a year later. He's patient, answers any questions I have, gives me tips on how to maintain the system and got me back up and running. I'll keep coming back here for my HVAC needs because I can depend on them. Im giving the 5 star specifically for Brent. I appreciate the business model and always getting there in a timely manner, their costs are just higher than most others.”

Keith Maholic

in the last week

“Anthony Romero Came out to my Home and it was very nice to have a service tech explain everything that he was checking and doing. Explaining what was wrong and how the service plans that were available and how they worked. Tony was very efficient he had the Blower motor replaced within a hour after he showed up very quick and would highly recommend him and Mitchell Heating and Air Conditioning Service.”

Bret Martin

in the last week

“Davis was amazing. Knew what was going on as soon as o told him. He was very professional and did not try to sell me stuff that I did not need. Will go back again if and when I need too.”