Atco Heating & Cooling | HVAC Services in New Lenox, IL 60451

This is a common issue in our area. First, check if the thermostat is set to 'heat' and the batteries are fresh. If problems persist, it could be a wiring issue, a faulty sensor, or calibration drift. Our technicians can diagnose the exact cause, whether it's a simple fix or a recommendation for a modern, programmable thermostat that improves both comfort and energy efficiency for your home.

Warning signs include a yellow or flickering burner flame (it should be steady and blue), soot stains around the furnace, excessive moisture on windows, or a persistent, unusual odor. The safest approach is an annual professional furnace inspection. We check heat exchangers for cracks, test flue drafts, and ensure proper ventilation—key steps to prevent dangerous CO buildup common in older furnaces in New Lenox homes.

We recommend a bi-annual maintenance plan. In the fall, our tune-up focuses on your furnace: cleaning components, checking for gas leaks and CO risks, and testing thermostat operation. In spring, we service your AC. This proactive approach catches small issues—like a failing thermostat wire or a dirty flame sensor—before they become major repairs or safety hazards, saving you money and worry.