Reliable heating & cooling services for when it counts

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Covering the fox valley & surrounding area
Why McNally’s?
  • Honest, upfront, competitive pricing
  • 10-year limited labor warranty on installs, 2-year limited warranty on repairs
  • All work thoroughly tested
  • Professional, punctual and courteous service techs
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We represent the finest HVAC manufacturers in the industry, bringing you the best in technology, efficiency and reliability.

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Don’t just take our word for it...

The furnace at my rental property stopped working and my tenant had called 4 seasons. The quote they gave me was absolutely ridiculous. I then called McNally's and spoke to Brian. He was extremely knowledgable and even came out the same day to do the repair. I highly recommend McNally's because they are a trustworthy company with fair prices and they do a great job!

Ali H.
Bartlett, IL

We were having problems with our furnace turning off intermittently, so we contacted Service Experts for a diagnosis. After a 10 minute evaluation, the technician indicated that we needed a new circuit board, roll out limit and blower capacitor that would cost about . They recommended just buying a new furnance (about K). We decided to get a 2nd opinion, so we called McNally's. The owner was on another major job (complete AC/furnace install), but came during lunch to check out our problem. He did not see any of the same issues that Service Experts diagnosed. He recommended that we try the simplest, cheapest alternative first, which ws to replace the thermostat. He installed one in 5 minutes and our furnace has run fine ever since. It is always nice to find a local service that doesn't give you the sales pitch, but rather looks for the most practical, economical solution. Very professional, knowledgeable and polite.

Pete K.
St Charles, IL