This ICM291 fan blower control board is a crucial component for your Carrier Bryant LH33WP003 or LH33WP003A furnace. It is manufactured by ICM Controls and is designed to regulate the speed of your fan blower motor for optimal performance. This product is classified under the California Prop 65 Warning and can expose you to methyl_carbamate, a chemical known to cause cancer or birth defects or other reproductive harm. Please ensure that this fan blower control board is compatible with your furnace model before purchasing.