With the cold days fast approaching, no one wants cold air in their home. If you catch yourself in this position, a few things may be wrong with your furnace. Learn why your furnace may be blowing cold air, and trust the experts to help!

Check The Thermostat

Be sure to check if your thermostat is set to ‘auto’ not ‘on’, as this could be the cause of cold air. When your thermostat is set to ‘on’, it will have your furnace running 24/7 even when air is not being produced. If it is set to ‘auto’ the furnace will only run during the standard heating cycle to ensure your home always stays warm. 

Air Filter Issue

When an air filter is dirty, dusty, or grimy, then it can cause a lack of airflow throughout your home, ultimately leading to cold air. Air filters typically become dirty with long heating cycles and overheating issues. Solving this issue should allow for proper airflow which can help the unit not overheat. 

Pilot Light Is Damaged 

If you find that your furnace is blowing cold air, it may be due to a damaged pilot light. This is essential to a gas system furnace, as it is designed to ignite the burners to help the system produce heat. This is specifically common on older gas furnaces but can occur on any unit. 

Grime On The Flame Detector

Some furnaces do not use a pilot light but rather a flame detector to help with a consistent heating cycle. If you find that cold air is coming out of your furnace, this may be due to dirt, grime or dust buildup on the flame detector, which will cause the unit to lose heat quickly. 

Condensate Lines Are Clogged

Many new furnaces are built to have condensate drain lines to help reduce the amount of moisture within the machine. If any of these lines get clogged, it can cause the burner to stop working which will ultimately stop warm airflow.

Low Gas Pressure 

If all of the resources have been exhausted, the last and final reason could be a lack of gas pressure in your home. Keep in mind that this is not an easy fix and will need to be done by HVAC experts. 

Contact Us  

If you’re experiencing cold air running through your home, be sure to contact us. Our experts will be sure to check for the source and help you fix it, so you can go back to having a warm home again. Trust the experts at Bronco Plumbing and Heating!