2000 4.0 xlt 4x4
heater blowing cold air the floorboards are dry

 

Low on coolant.
Heater core blocked.
Heater hose(s) blocked.

 

Thank you will check all tomorrow

 

Also make sure that your blend door is not blocked and functions properly. I would inspect the other items first.

 

Blend door is the most common issue on 1995 and up Fords in general
Key on engine OFF change the TEMP **** from hot to cold and back a few times, should HEAR the blend door and electric motor working, it's above glove box nearer the radio

Google: Ford Ranger blend door actuator replacement

To see where it is