Feet vents and defrost always on very low pressure from front vents
No matter what setting the air is set to it always comes out of the defrost and floor vents. And if i put my hand close to the front vents it feels like there might be a little air coming through. When the heater is on. Only defrost works it blows the correct temperature but its always on, the floor vents blow ice cold air. Im not sure what the cause is..ive tried looking for a vacuum leak, it sounds like there might be one but i cant find where it is. Please help.