A furnace converts oil, gas or electric energy into heat and the blower circulates that heat in every room of your home. If the furnace blows cold air, there may be a problem with the blower or any of the components of the heating system. Below are three reasons why your furnace blows cold air in Deer Park, IL.

1. Faulty Thermostat or Wrong Settings

The furnace blower fan will operate as long as the thermostat is set to on even when the heating system is off. Your furnace will blow cold air outside its heating cycle because of the thermostat setting. When your heating system is on and you still get cold air, it could mean that your thermostat is faulty.

A thermostat sends instructions to the furnace and other components of the HVAC. If it’s defective, it sends the wrong instructions, and the heating system blows cold air.

2. Overheating Furnace

If the temperature inside the heating system raises, it is likely that the heat doesn’t get to your home. The heating system, therefore, overheats and shuts down automatically. Your heating system will be hot, but your home will remain cold.

This problem can result from a dirty filter that restricts airflow. Cleaning or changing the filter as part of routine maintenance will allow smooth air circulation, and your home will warm as set on the thermostat.

3. Pilot Light Is Out

Newer furnaces feature an electronic ignition system instead of a pilot light. If your home is older, the furnace may have a continuously burning flame that ignites its burners. This flame is the pilot light.

If the furnace light goes out, your heating system doesn’t combust fuel. This means no heat comes from the heating system, but because the thermostat and the fan are on, the system still blows the cold air.

The pilot light stays on throughout the life of your furnace. An HVAC technician can help you relight the light so that your heating system can start combustion.

You could also experience cold air if any of the internal components of the furnace breaks. If you’re getting cold air from your heating system, call Martin Enterprises in Deer Park, IL, today for heating system services or any other HVAC services.

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