This morning my heater is blowing ice cold any ideas?

 

Have you checked your coolant level...???

 

No I haven't thanks

 

I also had that problem, but I filled the anti fluid and flushed the 01 ford and still blows cold air.Any ideas?

 

Check the vacuum lines to make sure they are hooked up and not leaking. replace if necessary.

 

Anytime you drain/add/refill the cooling system the heater should be on to get the water cavity in the truck full of coolant water, you have 2 hoses that are attatched to the firewall, 1 inlet, 1 outlet for the heater, if the system's full both hoses should be hot as water flows in and out of the cab of your truck.