2008 Crown Vic no HVAC heat

My Crown Victoria has manual dials for the HVAC. I have no heat in the car. The temp gauge is at medium after quickly warming up, the thermostat isn't stuck open... The two tubes running through the firewall get plenty hot as well.

Is this a heater core problem? Heater control valve problem? Blend door?

I am confident at this point I will have my technician friend do the repairs as I spent 2 hours dismanling a dash on a Vic in a junkyard and now know what a pain it is.

Thanks for your help!

Sure wish I coulda gotten an answer. I did enough dismantling of a junk-yard Vic to see it's my blend door.

Buddy i have the same problem and the same 2008 Interceptor NO HEAT!! TURN THE DIAL TO HOT OR COLD STILL GET COOL AIR ON THE VENTS WHEN ITS TURNED TO HOT?? I CHANGED THE THERMOSTAT AND THE HEATER CONTROL PANEL STILL NOTHING?? MAYBE I WILL CHANGE THE BLEND DOOR THE CHEAPEST I FOUND WAS 39.99 FREE SHIPPING ON EBAY! BUT AGAIN I HATE BUYING PARTS THAT I DONT NEED! MY NUMBER IS 336-300-0736 IF YOU HAVE ANY IDEA WAT WE CAN TRY?? THANKS TODD.