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Air Conditioning and Coolant
Heater Cores and Blower Fans
Dodge Ram
Car Heaters

Heater is blowing cool air?


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Wiki User
May 06, 2010 3:00PM

First, check the coolant level in the radiator. DO NOT open hot. Then decide if the a/c is on by looking at the compressor. An untrained eye will not know what to look for. Then you need to know if the temp door is working.

The only step an untrained mechanic should do is check the radiator to insure it is full. There is a small radiator inside the car called a heater core. It acts as a heat exchanger, hot water flows thru it and then air is blown thru the fins removing latent heat to the air which is expelled thru your dash. If there is no water in the vehicle it wont work.