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My a.c. unit under the hood is cycling cold but I am not getting any cold air in the car. It appears to be blowing outside air in the car. why?

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Hi,
It turns out the cars thermostat is sticking, as the engine gets hotter, the ac kicked out. Some sort of sensor turns off unnecessary stuff (like the compressor) to save it. I changed the thermostat, and no more problems. Let the car sit in your driveway idling, ac on. If the ac goes off, spray the radiator with water, and see if comes back on; then it's the thermostat. Another possible thing could be this air filter (cabin filter) is clogged. Usually it is located in the plastic duct work in the car behind the glove box. The filter was put in newer cars to filter out pollen, etc. getting into your car. I would check the cabin filter first. Either blow it out with compressed air to clean it, or leave it out. A new filter runs about $40 and it's a dealership item
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Posted on Jul 30, 2009

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