Heater problem
1997 Lincoln Continental V8 Front Wheel Drive Automatic 100000 miles

I am having problems with receiving heat in my car I received an answer but it did not work. I took the car for a ride to get the temperature up and came back ran the self diagnostic test. The clicking stopped for a moment than it started back again. It seem to me the door actuator isn't opening to let the heat in and no codes came up. Thanks for the advice but it you can think of anything else it sure would be appreciated. Will wait to hear from you.