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Q: Air conditioner switch is on with green light and air coming out but no cool air on 2005 Hyundai Sonata

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When I switch on the a/c of my Hyundai Sonata it blows air which is not cold. The A/c switch shows the green light. It is the same air as outside. I never had to use the a/c from the time I bought it last year in October.
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You might just be low on refrigerant. you can buy a can at the parts store for $30 to $40. You will need one with the hose. The directions are not hard to follow o the can. if you can find your compressor, there is 2 lines coming out of it. Each line has a port. The hose will only fit on the smaller port. It might have a blue cap on it to help locate it. I would recommend the bigger can since your air is not cool at all. Hope this helps. if you need more help just reply.
Thanks for your reply. After your suggestion I located the compressor and the High pressure and low pressure valve. The other thing I have noticed is that when I switch on the A/c there is no change in sound. With little knowledge I have, there should be some clutch sound when the a/c is switch on. The belt on the compressor is rotating even when the a/c is switched off. Not sure if that should happen. When I switch on the a/c, there is no change in sound except that the fans in front of condenser starts rotating.
I am sure you have this fixed by now... but for future reference, your A/C clutch with not turn on unless there is the proper amount of refrigerant (Freon) pressure in the system. This is to protect the compressor, as running with improper pressure with damage the compressor.
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