HVAC Repair Chicago IL | Call Dunn James Heating & Air Conditioning

First, check your thermostat settings and ensure the pilot light (if applicable) is lit. For safety, if you smell gas, leave the home and call your utility company immediately. For other boiler issues, call Dunn James. We prioritize emergency heating calls, especially during Chicago winters, and often have a technician on-site the same day to diagnose and get your heat restored.

Yes, uneven temperatures and high bills are classic signs of an improper installation, like incorrect ductwork sizing or a mismatched system. Dunn James experts perform a thorough evaluation of your Chicago home's layout and existing system. We can correct installation flaws, rebalance ductwork, and ensure your HVAC is sized and configured correctly for maximum efficiency and comfort.

We recommend bi-annual maintenance: a tune-up for your AC before summer and one for your heating system before winter. For boilers, this includes checking pressure, cleaning components, and inspecting for leaks. For full HVAC systems, we clean coils, check refrigerant levels, and ensure all electrical connections are secure. This proactive care helps prevent the most common Chicago breakdowns caused by seasonal strain and aging equipment.