Things You Didn'T Know About Ac Blowing Cold Air But House Still Hot: 1. Poor Insulation: Poor insulation can be a major factor in why your AC is blowing cold air but your house still feels hot. If the insulation in your home is inadequate, it can cause heat to enter the home and make it difficult for the AC to cool down the space. 2. Dirty Air Filters: Dirty air filters can also be a...