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Heater blowing out cold air? A/C not getting as cold?

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The heater and A/C have one thing in common, the blower motor. The heater is controlled by a vacuum system. The heater control is on the right (passanger) side under the hood. The heater control opens a water valve by vacuum. If the blower motor is blowing air and the heater is not working, this could be the cause. Note that the cooling system must be full of coolant for this system to work.

The A/C system is controlled during the defrost cycle and the A/C cycle. It sounds that you may have an air circulation problem if both the heater and A/C is not working properly. Again, if the vents are blowing out good air flow, there are other problems. If there is a freon problem, the A/C compressor will cycle on and off quickly and there will not be much cool air.

Hope this helps and please post more information about your problem for us to help.

Posted on Dec 29, 2010

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http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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