Front Windshield Defroster Not Heating

Do you have heat from the floor and chest level vents?

bad heating coil, or no heating coil, or the ac unit is out.

I don't believe I had any heat from any of the vents, but windshield was the most noticeable.

i also just had the radiator replaced, would this have any effect on the heater?

You may have a bad heater core. If it is the same age as the radiator, it may be partially clogged. With the new radiator, it may not be getting proper flow. Or, the system could be a little low on coolant.

The passenger side is heating, but not the drivers side. They are thinking its the blend doors.