[busboy4]

Hi
I trust you are keeping a close eye on coolant level? Typically no heat equals no/low coolant level. If your coolant level is normal I would guess you had a blockage between the water pump and the heater core, or in the heater core itself. Do you have rear air/heat? If so, you should have a separate heater core in the back. If both are "cold" I have concerns of very low coolant. Continuing on that line of thinking, could your sensor have been damaged due to high temps and no coolant flow?

I would check very carefully. And don't just look at the coolant recovery tank. Pull open the radiator cap as well (cool engine of course) and make sure there really is coolant there.