Best Heating & Air Conditioning / HVAC In Sioux City

“Kevin from Kalin's was fantastic. Our AC was completely out, and he showed up promptly, diagnosed the problem fast, and had it running again in no time. He was professional, efficient, and clearly knew his stuff. Really appreciate the quick response and quality work. Highly recommend.“

“Anderson is reliable and very communicative . They listen and have a caring attitude for their customers. They listen and address any issue or concern you may have and are very knowledgeable when it comes to fixing your ac or furnace .
We had our ac go out on one of the hottest days and they were able to come out and fix it in an adequate amount of time.
They are very trust worthy .
If you have ac or furnace issues Anderson heating and cooling is the place to go !“

“I bought a house last year and had heating and cooling installed. Not only was it more cost effective than others in the area, but they worked with me to find a layout that wouldn’t damage the original woodwork in my home. They took into consideration that we may renovate areas of the house, and set it up so that it would be an easy conversion with the duct work. They were all so nice and respectful, and took the time to explain everything to me! I highly recommend!“

“Mike was SO helpful. Our AC unit went completely out when it had just gotten into the 90’s… I’m getting married in two weeks and of course panicked because of the price. we were quoted $4,000-$11,000 from various different companies. We would have needed to replace our unit and coils due to the new units not working with our old coils.

Mike went out of his way to find us a new unit that was last years model that WOULD work with our current coils. Instead of paying $4,000… we were only out $2,600. We are so unbelievably grateful for him! ?? I could not recommend them any more. Don’t waste your money if you don’t have to.“

“As always Rasmussen pulls through with the great work they do for our company. Highly reccomend there service for your needs. Great guys to work with!“

“I cannot say enough good things about this company. Super professional and great to work with. They made time in their schedule to fit me in on short notice when I needed them the most. Not only did they do high quality work and provided an exceptional experience, but pricing is super fair. They have earned my business for life.“

“Ethan and Jacob were awesome today. On time and very professional. I would recommend definitely recommend them.“

“bought my combined outside heat and air unit through Peterson,always on time and reasonable“

“No call back from vendor after AHS called and left message. Second contact with AHS necessary. Tech very friendly and explained details“

“Did a awesome thorough inspection of our ac unit n git right to business diagnosing and repairing, while upmost being honest with my gf while i was at work.“

“We had a plumbing leak from a pinhole leak and they were able to offer same day service for us. This is not the first time it has happened and they always fit us in either same day or next day and do quality work in a reasonable amount of time!!!“

“I would like to give a very big shout out to O’Connor Heating & Cooling and their incredible team. Having worked in property management for several years, I’ve been fortunate to learn quite a bit about maintenance. However, one thing I did not fully realize was the importance of regularly cleaning not only your dryer vents, but also the ductwork throughout your home.

During a recent cleaning at my home, the technicians from O’Connor discovered dangerously high carbon monoxide levels. This discovery truly may have saved my life.

For the past several weeks, I had been feeling extremely tired and unwell. I even went to the doctor and had blood work done, but everything came back normal. Looking back now, the symptoms—persistent headaches, fatigue, and flu-like feelings—were likely caused by the carbon monoxide exposure. My son and I had both been feeling miserable and couldn’t figure out why.

What’s even more concerning is that I had two plug-in carbon monoxide detectors, and neither one alerted us. That alone was a huge wake-up call for me about the importance of having reliable detection and routine HVAC inspections.

The fact that the O’Connor team took the time to thoroughly check everything and discovered the issue speaks volumes about the quality, care, and professionalism of their technicians. It truly shows they are not just doing a job—they genuinely care about the safety of the people they serve.

I strongly encourage everyone to have their dryer vents, ductwork, and HVAC systems checked regularly, and I highly recommend O’Connor Heating & Cooling.

From the bottom of my heart, thank you for potentially saving my life.“

“TJ and his crew helped me and my family out right away when we needed it. Everyone was extremely professional and courteous. TJ tracked down and spoke with vendors to help our situation. TJ went above and beyond for us. Best in Sioux City!“