A/C: Sometimes it works, sometimes it doesn't... Sometimes it just turns on... - Hyundai Elantra Forum
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post #1 of 2 (permalink) Old 08-25-2019, 05:01 PM Thread Starter
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Question A/C: Sometimes it works, sometimes it doesn't... Sometimes it just turns on...

I'm really puzzled by this problem. Sometimes my A/C works fine. Other times, I turn it on and it does not work. There is no air getting pushed out through the vents. If I am driving on the highway, sometimes I can feel a little cold air coming into the car. But then... the A/C will just turn on. There have been other times when I am not using the A/C. It is actually off, but I will hear it click and it comes on for a few seconds, and then clicks and turns off. It is a 2009 Hyundai Elantra. Any thoughts on what the problem could be and cost? I just want to provide some direction to the mechanic - and I dread taking it to the dealer because they are going to be a lot more expensive.
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post #2 of 2 (permalink) Old 09-06-2019, 09:40 PM
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OK so the way this works is your AC compressor works off of system pressure and ambient temperature. Are your front radiator fans working and cooling normally? Also, your system may have a low charge of freon which usually indicates the presence of a leak. If you don't have the tools to look and test for leaks you should take it to Hyundai or a specialist.

2019 Hyundai Elantra 2.0
1994 Nissan Sentra SE-R SR20DE

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