And because your furnace is no longer heating the air being pushed into your home will be cold.
Goodman electric furnace blowing cold air.
So once a heating cycle ends and the furnace burners cut off the fan continues to blow.
This will prevent the exhaust from escaping and cause your issue.
Have an expert inspect your ducts along with the furnace.
If your furnace fan is set to on the fan runs continuously whether or not your furnace is producing heat.
Also make sure all of the supply vents are open and the return air grilles are all clear and unobstructed.
If your furnace starts blowing warm but then quickly turns cold the flame sensor may need attention.
My brother s furnace started blowing cold air one on of the coldest days of the winter.
Make sure your flue is open and not blocked or restricted by dead animals.
This video shows step by.
Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building.