Q: heater blows cold air when turned on on 1996 Ford Explorer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
heat was fine turned car off for a minute started it up no
heat. blows cold air. can here it change from vent to defrost to floor but no heat.
(1) Answer
There is a motor in the dash that controls the blend of hot and cold air. The temperature blend door actuator could be failing, causing the door to stick on "cold".