Help!!! NO HEAT!!!! Its COLD!!!!

[Abominous95XLT]

There is no heat in my explorer!
Let me start from the begining... I installed my new PIAA 80 XT pros last thurs they are very cool. But nothing that cool can happen without something really bad happening to. So, this Saturday my heat just stopped working. It worked fine Friday night and Saturday morning but Saturday afternoon no heat. The blowers still work. They just blow cold air. Its the same with the back blower. Lots of cold air but no hot air. I checked all the fuses that might be related, no problems. I changed my anti-freeze yesterday (Sunday) and then I went out and got a new thermostat. Installed that, still no heat. Im going to take it to the Ford dealership today. I have to have this fixed; It was 10F this morning in Mass.
Has this happened to any one else? What is wrong? how much $$$ to fix it? Is there anything I can do?

HELP!!!!!!!!!
(I also posted this on General Explorations)

 

[shooter_1000]

I suspect your old thermostat did go bad. So by putting in the new one the problem should be fixed. What I think is happening is that the cooling system is not full. YOu should not be driving it untill you are 100% positive that it is full.

There is a small bleed hole in the thermostat that slowly lets the air out of the block. When filling up the rad, let it stand for awhile then check again, you will see the antifreeze has went down a bit. Top it back up, go through this a couple times and then start it up and make sure the heat controls are in full heat position and wait till the thermostat opens and you can see circulation in the rad. Now the air in the system should be out and you can top it up and top up your reservoir.

I put a 205 degree t-stat in mine for more heat and it has no bleed hole, so when I change my antifreeze, I leave the thermostat housing loose till the block is full and then tighten it back up and then start the engine till circulation happens and the top the system up.

I hope this helps.