A/C intermittently blowing hot air?

It sounds like the system is low on charge. here is a video and a guide to help us fix the problem:

https://youtu.be/4UjfQKvrB6Y

and

https://youtu.be/uZrQCGwXfek

and

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

Please go over these guides and get back to us.

It could be but to confirm let's check for power at the compressor when the system is on, and the compressor is not working.

This guide can help:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Test the wire going to the compressor and let me know.

Okay, you have found the problem; the compressor coil is bad and needs to be replaced. You may need to remove the compressor which at this time you may consider replacing it as a whole unit. Here is how the job is done step by step and I have included instructions in the images below for your car.

https://www.2carpros.com/articles/comprehensive-guide-how-to-replace-an-ac-compressor-clutch-on-a-car

You will need to follow this video:

https://youtu.be/4EqdrBVb0sY

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.