AC problem

It sounds like the controller has gone out, but lets check the fuses first and the refrigerant level. Here are some guide that will help you.

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

and

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

I have included the air conditioner wiring diagrams so you can see how the system works.

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

You need to have the computer scanned if the light is flashing to pull trouble codes. That will identify where the problem is coming from.

That sounds like the evaporator core is icing up which means the system is low on charge. Here is a guide to help you refill the system:

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

The system will ice up because the low side pressure goes to low when the system is low on refrigerant.

Please let us know what happens.

Cheers Joe

Ok, if the blower is not working, it could be either the blower motor itself or the blower resistor. It needs to be checked for the failure before discussing money

Roy

Some customers may comment on poor A/C performance or that the A/C does not get cold enough after a long drive.

Some of the possible symptoms of this condition are:

1, Blowing warm air

2, Reduced air flow

3, Mist/Vapor coming out of vents

Cause:

The cause of this condition may be due to the evaporator core freezing up.

Fix It Right the First Time Tips:

DO NOT replace the evaporator temperature sensor for this condition unless diagnosis proves it to be the root cause. The sensor can be checked for proper function using the Tech 2 Â. Check the sensor for volts varying around 2.3V to 2.6V. This data is within the BCM and is displayed in the accessory list. If the volts are near zero, check for a good connection at the sensor. Also, inspect the harness for possible damage. The sensor is located on the driver's side of the HVAC module and can be accessed from underneath the instrument panel by removing the closeout panel and OnStar  module, if equipped.

DO NOT replace the thermal expansion valve (TXV) for this condition unless published SI diagnosis proves it to be the root cause.

If AC components have been replaced or the refrigerant has been evacuated and recharged and no PAG oil has been added back into the system, it may have a reduced oil level. Please ensure that the vehicle has the proper amount of PAG oil in the system, as low oil level will contribute to the evaporator freezing up. To return to a nominal level of PAG oil, it may be necessary to flush the system. Refer to SI for flushing instructions.

Correction
Important: The Tech 2 Â must have software version 27.009 or later.

Recalibrate the BCM with new software using the Tech 2 Â and following the procedure below. This updated software will control the cycling of the compressor clutch to prevent freezing of the evaporator core.

Install the Tech 2 Â to the vehicle and power on.
Turn ON the ignition, with engine OFF.
Select "Diagnostics."
Build the vehicle.
Select "Body Control Module".
Select "Module Setup".
Then press "BCM Setup" soft key to execute update. When completed command state will change from "None" to "BCM Setup".