Lafesta AC not working

My 2014 Nissan Lafesta with a gasoline engine is giving me A/C troubles. The air conditioning system refuses to switch on, blowing only hot air. The mileage is at 36876 km. There's an error stored in the error memory, and I suspect undervoltage. I've checked the belt tensioner, but everything seems fine there. Could it be a faulty relay switch or a pressure sensor issue? I hope someone can point me in the right direction.

4 comment(s)

Hey, I had a similar issue with my Lafesta. Check the A/C compressor relay. Is the compressor clutch engaging?

How exactly do I check the A/C compressor relay and the compressor clutch? Where are they located, and what should I be looking for? Sorry for all the questions, but I'm not very experienced with car repairs.

Best to take it to a workshop. Sounds like the exact same problem I had. They will have the right tools to diagnose it correctly.

You were spot on! I took it to the workshop, and it turned out to be a faulty relay switch and some wiring corrosion causing undervoltage, just as I suspected. They replaced the relay and cleaned up the wiring. The total repair cost was 240€.

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