Im not getting any heat blown into the car. The fan works, but it never blows hot air through my vents. What could be wrong?

 

Do some checking first. Engine at normal op temp, feel your heater hoses. Should be hot all the way up to & out of the heater core. If not backtrack feeling hoses. Check the water control valve to make sure you have flow coming out of the valve. Valve is vac operated - so check for vac, or apply external vac source to ensure its working. You could also have a clogged heater core. Any cooling system work done recently?
Good luck
Corky

 

I have had the a/c system evacuated a new pigtail installed behind the a/c controls. But ill check that stuff. thanks.

 

May be as simple as the A/C tech knocked off a wire or a vac line.
Corky

 

You do have enough coolant correct?

On my old car, the air from my heater would randomly be hot, cold, hot cold, and a couple weeks later, it started overheating

Put some coolant in, cured both problems