No heat 2002 F250 7.3l
 

Title says it all, I have replaced the blender door actuator. And am currently looking for where the heater co tool valve lives. I don't see it in the engine bay and under the dash it's just the hard lines from the heater core. There may still be a chance that the heater core is clogged I guess. Any help is much appreciated. Currently doing water pump and about to back flush the heater core.
https://cimg5.ibsrv.net/gimg/www.die...9e5a371bef.jpg
https://cimg5.ibsrv.net/gimg/www.die...15cdeb4a0d.jpg