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Matrix AC not cooling

Hey, I'm having a real headache with the AC in my 2006 Hyundai Matrix, gasoline engine, with about 140,000 km on the clock. Recently, the air conditioning just stopped cooling completely. The whole system doesn't even seem to be switching on when I press the AC button. I've checked the obvious stuff like fuses, but they all seem fine. Could it be the compressor? Or maybe a blockage somewhere? I'm not really sure where to start digging deeper. Any ideas?

The air conditioning in a 2006 Hyundai Matrix stopped cooling, and the system doesn't activate when the AC button is pressed. Initial checks of fuses showed no issues, leading to speculation about a faulty compressor or blockage. A suggestion was made to check the pressure switch and AC relay, as these could prevent the compressor from engaging. It was advised to consult a professional for diagnostics, as the issue might be complex and require specialized equipment.

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4 comment(s)

I had a similar issue with my old Saab 9-3. It turned out to be a faulty pressure switch, which prevented the compressor from engaging. The ECU needs a signal from that switch before it will allow the AC to operate. Have you checked the high and low side pressures in the system? A simple AC diagnostics run might reveal a faulty pressure switch or even a defective AC relay. It's also possible there’s an issue with the temperature control, although that's less likely to cause a complete system shutdown.

Thanks for the tip! I haven't checked the actual pressures yet, to be honest. I don't have the equipment for that. Where exactly is the pressure switch located on the Matrix? And is there a way to test the AC relay to see if that's the problem before I start ripping things apart?

On the Saab, the pressure switch was easily accessible near the condenser. Regarding your Matrix, I would check the service manual for the exact location, but it’s usually along the refrigerant lines. I wouldn't advise extensive DIY diagnostics without the proper equipment; you might inadvertently introduce more problems. I suggest taking your Matrix to a workshop. It may be a valve defect; in my case, it was less than optimal. You might encounter similar challenges.

Okay, thanks! I'll take your advice and get it checked out by a professional. I was hoping it would be something simple, but it sounds like it could be more complex than I initially thought. Thanks for pointing me in the right direction!

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HYUNDAI

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MATRIX