Hook a hose pipe from your house to one side of the heater hose. Unhook the other side and aim it towards the ground. Flush it out and see if anything comes out.
Is the heater fan blowing through the heater core?
The fan is working and I am getting some heat inside the car,but not nearly enough!I also had a -67 Valiant a few years ago and that car provided much more heat inside the car!
