One common area of a furnace to malfunction is the blower compartment. Inside this compartment are many different components, including the blower motor, pulley, fan, and fan belt. It’s typical for the blower fan belt to wear out over time and fray into multiple pieces. When the belt comes off the pulley, you’ll notice no airflow coming out of your air vents even though your furnace is running. One of our technicians will need to replace the blower fan belt to restore functionality to your heating system.
Another typical area for a malfunction is the combustion chamber. This chamber houses various components, like the burner, flame sensor, and ignitor. Older furnaces have a pilot light, while newer ones have an electric ignitor. If the burner isn’t lighting when your furnace kicks on, it could be an issue with one of these ignition components.
For example, the electric ignitor could be faulty, which keeps it from sending a spark to the burner so that it can ignite. You may also have issues with the pilot light. In other cases, the burner may light up, but go out right after. This could be the result of a problem with the fuel supply, like debris blocking the orifice. Or, it could be a defect with the flame sensor. Its photo sensor eye may be dirty, or the sensor itself may be faulty and in need of replacement.