Before assuming the worst, make sure your thermostat is set to the correct settings. If it’s on “fan” mode, the blower will run continuously, even when the furnace isn’t producing heat. Switch it to “auto” so it only runs when the furnace is actively heating.

If your furnace gets too hot, it may shut down as a safety precaution while the fan continues to run, pushing out cold air. Dirty air filters are a common cause of overheating. Check your filter and replace it if it’s clogged with dust and debris.

For older gas furnaces, a pilot light failure can prevent the system from producing heat. If you notice that the pilot light is out, try relighting it according to your manufacturer’s instructions. If it won’t stay lit, there may be an issue with the thermocouple or gas supply, which requires professional repair.

If your furnace relies on natural gas or propane, an interruption in the gas supply can prevent it from producing heat. Make sure your gas valve is open and check if other gas appliances in your home are working. If there’s a widespread gas issue, contact your utility provider.

Even if your furnace is working properly, leaks or blockages in your ductwork can cause warm air to escape before reaching your vents. A professional inspection can identify and repair any leaks, ensuring efficient heating.

A dirty or malfunctioning flame sensor can cause your furnace to shut off the burners as a safety measure, resulting in cold air blowing through the vents. A professional technician can clean or replace the sensor to restore proper operation.

A furnace blowing cold air can leave your home feeling uncomfortable during the winter months. Whether it’s a simple fix or a more complex repair, our team at Fry Plumbing is ready to help. Contact us today for reliable furnace service and keep your home warm all season long!