A/C blows hot air

Let me get a clarification please, your controls are digital, and the numbers do not change when lowering to the desired temperature? Or the digital readout lowers, but the A/C blows hot?

This sounds like a temperature blend door actuator that is not working.

https://www.2carpros.com/articles/replace-blend-door-motor

Run the self diagnostic test on it by turning the key to on, then press off and floor at the same time, then within two seconds, press auto, If there is a problem a trouble code will appear on the display. To exit self test, press the blue, cooler button this also retains error codes, To erase codes and exit, press defrost, choose one of these before you power down the system. Test with engine at 120 degrees or more, and cabin between 40 to 90 degrees. Post any codes recorded here and I let you know what is defective.

Here are the wiring diagrams for the air conditioner so you can see how the system works.

There are 6 fuses that run the system lets start by checking them by using the wiring diagram to show you the fuse numbers below.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers

My guess would be the blend door, but the lines should be rotating as it performs a system test, then it should report codes, or 888 for pass. The test does take a few minutes, did you wait?

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.

Cheers

Blend door failure is a pretty common problem on this car. I would get it checked out.
Either the blend door or the blend door actuator.

Is the magnetic clutch engaging the compressor when you turn AC on?

Check the high and low pressures this will determine if it needs Freon. Could be the clutch, pressure switch and the air blend door stuck in the heat position.

It may be low on Freon.
Have it checked or add 134A.
Check if clutch on compressor is working.
Check fuses and relays.
Good luck.

I do not know what type of gauge you are using, but maybe the one built into a can of R-134a? Get a normal set of manifold gauges, and go from there, the A/C compressor cycles too much because it is low on R-134a. Charge with A/C set in normal A/C mode, not max!

Hi there,

The first thing you should do with any A/C problem is get the pressures checked. This will give the Tech a better idea as to what the problem may be. Just adding refrigerant into the system can cause more problems. Get it tested first.

Mark (mhpautos)

Behind the dash, center accessed from the bottom and through the glove box.

What are the pressures on the AC?

Roy

If it is putting out cold air then hot I would believe there may be a leak someplace. There are dyes you can get at a auto store to help find the leak. Also, it does sound like it is low on Freon.

https://www.2carpros.com/articles/air-conditioner-leak-detection