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AC Blowing hot air

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My car is GMC Terrain 2016, the ac system not working, it blowing hot air. I thought it was the blend door actuator which I replaced a new one but the problem is not solved.

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The problem could be either electronic or mechanical. Is your compressor running? What are the high and low system pressures?  The electronics would need to be diagnosed with a professional-grade bidirectional scan tool.

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