2000 Dodge Intrepid reasons why heat want only blows cold.

Is your temperature gauge showing normal operating temperatures? Is it running hot at all? First thing is to check your coolant level. Any air pockets in the system can cause your heater to blow cold air. A faulty thermostat will also cause lack of heat. Check your heater control valve to make sure it is allowing coolant flow through the heater core. When the engine is warm and your heater is going, feel the heater hoses by the core to see if one or both is cold. Have a friend adjust the temperature to see if the control valve actuates. Hope this helps