How to fix a non-functional A/C in a Kia Niro?

My Kia Niro's A/C stopped working suddenly, what could be the cause and how can I fix it?

First, check the fuse box to see if any of the A/C related fuses have blown. If so, replace them and see if that fixes the issue.

If the fuses are fine, the next step would be to check the A/C compressor. It may have failed and will need to be replaced. This can be a costly repair, so it's important to get a quote from a trusted mechanic before proceeding.

Another possible cause could be a leak in the A/C system. Check for any visible signs of leaking refrigerant and have a professional diagnose and repair the issue.

In some cases, a non-functional A/C could be due to a faulty temperature control module. This would need to be replaced by a mechanic.