Hey all, new to the forum, wanted to say hello and ask for your infinite knowledge! I tried searching throughout and turned up empty for my heat issue.
I have an 84 F150 4x4 with a 351W and a C4 tranny, the truck is not getting any heat and its fricken cold this weekend! I found out the heater core was plugged solid and replaced that but to no avail.....still no heat, anyone have any pointers to get me in the right direction?

Thanks

KP

 

If your heater core was plugged up you might have a cooling system in need of a good flush & new antifreeze, also check your thermostat & replace if needed. Make sure if there is a shut off valve that it is in the correct position to allow circulation.

 

Thank you sir, ill be sure to check the shut off valve....where would it be located?

the whole cooling system is brand new, hoses, water pump, thermostat, all new.....

 

Maybe you need to bleed the cooling system. As this video shows make sure you have the heater control set to hot.
You may need to bleed the system more than once:

 

thank you! the video was actually fairly helpful, ill try and bleed it out tomorrow weather permitting.

 

I thought the video was cool, buttttt!. Before is put my foot into my mouth, when its light enough to see outside, I am going to look for this bleeder valve, I don't remember seeing one on any ford. And I can't remember when Ford discontinued the manual heater water valve. I know my 1973 F250 has it but the rest don't.

The video had some truths in it about the air in the system, its a definite no-no, lots can be affected by an air bound system.

 

i could not find this bleeder valve, i did manage to bleed the system though but to no avail.....still no heat