I have added yet another heat topic to the board. I purchased a 'new' 02' Taurus (84Kmiles) and now that winter is here i noticed it has little to no heat even with the car warmed up. It isnt a huge deal since i live in south Texas but would like to fix it since I have a 3yr old and a newborn in the car sometimes and I don't want to freeze them out.
If i change the manual air temp controller from cool to hot there is a slight temperature change in the air so i assume the flap is ok. Is the next logical step to the above problem the Clinton Heater Flush?
Hopefully for you 'Clinton Flush' will last more then a month. Otherwise, man up and do heater core replacement. But be careful around pivot shafts behind blender door. They're very fragile! Ask me how I know.