Winter in Des Plaines, IL, can be brutal, and when your furnace keeps shutting off, it’s more than an inconvenience—it’s a real problem. Several common issues could be causing the system to malfunction, and understanding them can help determine whether it’s a simple fix or time to call in a professional.
Thermostat Troubles
One of the first things to check is the thermostat. It might seem obvious, but sometimes the settings are incorrect or the batteries are running low. If the thermostat is accidentally switched to “cool” instead of “heat” or positioned too close to a heat source, it may not register the correct temperature, causing the furnace to behave unpredictably.
Clogged Air Filters & Poor Airflow
A furnace relies on consistent airflow to function properly, and when the air filter is clogged with dust and debris, the system may overheat and shut off as a safety measure. If your furnace turns on but doesn’t stay running, a dirty filter could be the culprit. Replacing it regularly—ideally every one to three months—not only prevents overheating but also improves overall efficiency and indoor air quality.
Overheating from Blocked Vents or Dirty Components
If a furnace overheats, it will automatically shut down to prevent damage. This can happen when vents are blocked by furniture or when internal components like the blower or heat exchanger become clogged with dirt. Ensuring that vents remain open and unblocked can help maintain proper airflow.
Faulty Flame Sensor or Limit Switch
Modern furnaces include safety features designed to shut down the system when a problem is detected. Over time, components like the flame sensor and limit switch can accumulate dirt or wear out, causing the furnace to shut off unexpectedly. When this happens, cleaning or replacing these parts is often required to restore proper function.
When to Call a Professional
Some furnace problems have easy solutions, but others require expert attention. If your system continues to shut off despite troubleshooting, a professional inspection is the best course of action to prevent further damage or safety risks.
Stay Warm with Atomatic Mechanical Services, Inc.
A malfunctioning furnace can make winter unbearable, but you don’t have to face it alone. Atomatic Mechanical Services, Inc. provides expert furnace repair and maintenance in Des Plaines, IL and the surrounding areas. Our experienced technicians can quickly diagnose the issue and get your heating system running smoothly again, so you can stay warm and comfortable all season long.
