THe reason I aske that you do that was to determine if the heater core is plugged. If both hoses were hot, it isn't. That is a good thing.
WHat is left is the blend door. It is located near the heater core. Its job is to do the following:
WHen you want heat, closes on one direction to force the fan to blow over the (hot) heater core. When you want AC, closes the other direction to block the heat and allow AC to enter. If it isn't closing fully, it will block all or some of the air going to the heater core. As a result, you don't get much heat if any at all. Again, the heater core is good; therefore, the blend door must not be working properly.
Have that checked and let me know what you find.
Thursday, February 18th, 2010 AT 7:43 PM