Question about 2003 Chevrolet Venture Passanger

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Blows ice cold air out of deforst

After the engine has warmed up to half way point the ice cold air still comes out. When sitting at a light or parked and running still cold air blows until the engine goes almost into red over heating then warm air comes out only happens after going down the highway.

I think it may be the thermostat. Does this sound right or do we have a problem with the defrost?

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Will not be the thermostat. Most likely you are low on antifreeze (coolant). This may be caused by a leak in the head gasket or manifold. If so major problem. Check your oil to see if there is water getting into the engine. It will appear as white milky substance. If so fix immediately or lose the engine.
The other problem may be the water pump has failed. If you look at the engine you may see a lot of water (coolant) on the left side of the engine which is where the water pump is located. ( left side if you are looking into the engine compartment) If it is the waterpump you are looking at app. $200-$250 parts and labour taxes in Canadian.
I had the same problem mine was the waterpump.
*************************************WARNING*****************************************
Do not let the engine go into the red. If you do you are in danger of warping the head and then bigger problems

Posted on Dec 21, 2008

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