Try pulling HVAC fuse inside truck it will reset the actuators. Your blend door actuator is the problem if both heater hoses are hot when truck warm. If it does not blow heat after a reset then check to see if actuator is getting power or not. You may have two actuators one for left and one right. See pictures. Dash has to be pulled in order to replace one of them.
Images (Click to enlarge)
Monday, January 16th, 2017 AT 9:34 AM